Firearms secret projects

[Grey Havoc]

Via dieselpunks, here's another image of the AO-27 and the round it fired:

 

[Bottleship]

Stalins's Kriss Vector (1929/1930)


Bullpup belt-fed AR/BR/LMG (barrel is rolling on cartridge, special belt, full-auto) (1933/1935):


Buck-flechette for shotguns (1921/1924):

Big full-auto pistol (1927/1929):


...
Also, other projects (without images)
U-2 rifle - one of special sniper rifles, works in pre-WW2 period. Cartridge - 7.62x80, base diameter ~14.5 mm. Idea - very long range, accuracy, and, lighter than weapons in 12.7x108 (information of Russian historicist Ruslan Chumak). 10-round magazine. Also, worked at new ~10 mm special cartridge.
Full-auto grenade launchers, 45, 65 and 76.2 mm.
Recoiless 37 mm anti-tank rifle (engineer Slutskiy and other, without Kurchevskiy) - full weight 63 kg, ballistic - 37 mm M1930 gun (variant of German 37 mm gun, who later named a PaK 35/36) - 0.66 kg AP shell, 820 mps.
Markevich shotgun (~30th) - 5-round revolver, gas-operated, 24, 20 and 16 gauges, 70 mm case, choke - muzzle break compensator, weight in 20 gauge - 2.8-3 kg. Not realised.
GARS - Gurevicha Aktivno-Reactivniy Snaryad (Active-Reactive Shell) - rocket for shotguns, for shoot of light-armoured and light vehicles, infantry groups, etc. Worked at WW2 by Evgeniy Samoylovich Gurevich, for partisans.
Baranov "pocket mortar" - based on OSP-30 signal pistol, use special mortar shell in 4 gauge case, 3 inch lenght. Also, used a special aim. Projected in 1943, Soviet Kampfpistole, not produced. But, in WW2 produced light incendiary rocket for signal pistols.

 

[drejr]

Centrifugal grenade launcher on GAZ.

 

[riggerrob]

"

The Lower picture is one of a number relating to German projects to develop small arms capable of firing around corners. This worked somewhat better -- if I remember corectly the attachment was called a Krumlauf -- and they were actually issued to field units in the last months of the war.

To tell the truth, I'd love to see an additional region on the site covering small arms, artillery, and similar systems!

Regards, Abraham

"

Those "corner guns" were primarily issued to self-propelled guns like Panzer Jager to get rid of pesky Russian infantry climbing on top, trying to pry open hatches, etc

 

[Fluff]

View attachment 621434

Centrifugal grenade launcher on GAZ.

Must have seemed like a good idea. Ended up bigger than a mortar, and 5000 times more dangerous to the user. Why don't we use catapults again??

 

[Bottleship]

Soviet post-WW2 PSA/PSA-1/ASP (copy of American AN M8 pistol) with experimental grenade (~40% more powerful than grenade for Kampfpistole).



Baranov "pocket mortar" (1943)
Weight of shell - 175 g, explosive charge - 8 g, range - 200-350 m (and, idea of upgrades to 600-700 m)



Also, without images - project of engineer Hudelman (creator of many Soviet aicraft cannons, HS-23, HR-23, HN-57, NS-45, N-57, NS-76) - 1935 year, full-auto grenade pistol, 25 mm, 80-100 rpm.

 

[Bottleship]

Vladimir Karlovich From, LMG (1917) - Villar-Perosa + Gast + Gebauer. Or, maybe, grandfather of TKB-059/Pribor-3B
8.4 kg, triple-barrel, crankshaft, rate of fire - regulable, to 900 rpm, 7.62x38R Nagant "upgrade", with "full power" - 18-inch barrels. Magazines - 50-round, fast-loading. Projected for infantry, scouts, cavalry, motocyclists ("can montage on rudder") and air forces, idea - lighter than Maxim M1910, and, lighter cartridges, but, large distance. I haven't data about muzzle velocity, in my calculations, with standart 7-7.5 g bullet and standart load, it's a 430-460 mps, but, range - to 1200 shag (854 m) - very big for standart cartridges. I don't know, what is a "upgrade". Maybe, it was a "long" Nagant*:

http://municion.org/7_62nagant/Long-Nagant.jpg

*Soviet 7.62x38R cartridges - 5.5 g bullets, 410-415 mps standart and 550 mps long. Also, in early 30th created "magnum" 7.62x38R with powerful load in standart size, 7.5 g, 320-370 mps, and, I haven't data about analogical cartridges in WW1. By my calculations, Soviet "magnum" in 18-inch barrel - it's 500-562 mps, "long" cartridge - 858 mps. (.327 federal magnum - cartridge in 7.62x38R size - with 100 gr / 6.48 g bullet in 4 inch barrel - 1604 fps / 489 mps, in 18 inch barrel - 2186 fps / 666 mps; or, with 115 gr / 7.45 g bullet in 4 inch barrel - 1451 fps / 442 mps, in 18 inch barrel - 1880 fps / 573 mps)

 

[riggerrob]

Dardick

http://blog.modernmechanix.com/2006/10/page/4/

Jon

www.forgottenweapons.com broadcast a video on Dardick pistols 2019, November 12.

 

[riggerrob]

Up untill now we've seen a lot of the bigger hardware in this section, but I was wondering if anybody had informations on secret projects regarding small arms and machineguns?
The only thread of interrest I managed to find regarded the Girojet project.
So if any of you guys have such info, feel free to post it here.

Thnx
Wouter

www.forgottenweapons.com covered the Gyrojet carbine on August 27, 2015 and the Gyrojet pistol on September 8, 20114. They proved wildly inaccurate and only a few of these futuristic firearms sold to civilians. These days Gyrojet ammunition is rare and ridiculously expensive.

The only significant production run was A/P25S-5A Gyrojet flare guns that were issued to USAF air crew for many years. White, green, blue and red flares rose to an effective altitude of 1,500 feet.

 

[Forest Green]

Steyr IWS 2000

(Not sure it classes as a small arm.)

Steyr IWS 2000 - Wikipedia

en.wikipedia.org

 

[riggerrob]

Hah!
Hah!
That Steyr IWS 2000 hardly counts as a “small arm.”
The usual dividing line is at weapons that can be carried by one man and fired from the shoulder. At 18 kg (39.7 pounds) that Steyr is too heavy to be fired from the shoulder.
The other dividing line is around .50 (12.5 mm) because a lot of black powder rifles were around .50 cal.

Canadian gun laws severely restrict civilians from owning (smokeless powder) modern rifles more than .50 calibre. The RCMP banned Barret .50 cal. rifles for civilians, but another dozen manufacturers introduced large rifles - firing Browning .50 cal. heavy machine gun ammo - that circumvent that law.

Shotguns are under a separate category under Canadian gun laws, because they are loaded much lighter than rifles and have much slower muzzle velocities. CGL don't limit shotgun magazine capacity because only tube magazines were available when the law was written. Then some dastardly American invented a shotgun with a box magazine!
Hah!
Hah!

 

[Forest Green]

Then I offer this.

Pancor Jackhammer - Wikipedia

en.wikipedia.org

 

[DWG]

The other dividing line is around .50 (12.5 mm) because a lot of black powder rifles were around .50 cal.

Shotguns are generally considered small arms:
10 Ga = 19.69mm
12 Ga = 18.53mm
16 Ga = 16.83mm
20 Ga = 15.63mm

And a lot of black power rifles were considerably over .50 cal:
Brown Bess (4.3m built) was .75 cal
Springfield Pattern 1795 (150k built) was .69 cal
Dreyse Needle Gun (1.15m built) was .61 cal
Pattern 1851 Minié was .70 cal
Only around the ACW do you start to get calibre dropping below .60, and initially not by much.

 

[Forest Green]

Shotguns are generally considered small arms:
10 Ga = 19.69mm
12 Ga = 18.53mm
16 Ga = 16.83mm
20 Ga = 15.63mm

And a lot of black power rifles were considerably over .50 cal:
Brown Bess (4.3m built) was .75 cal
Springfield Pattern 1795 (150k built) was .69 cal
Dreyse Needle Gun (1.15m built) was .61 cal
Pattern 1851 Minié was .70 cal
Only around the ACW do you start to get calibre dropping below .60, and initially not by much.

Shotguns go up to 40mm, if you count a sawn-off M79 with flechette rounds as a shotgun.

I believe there is a .950 JDJ hunting rifle too.

 

[riggerrob]

Dear DWG,
You do have a point about large calibre, black powder rifles, but the only significant batch of black-powder rifles bought by the Canadian Army and Northwest Mounted Police were breech-loading .577 Snider Enfields bought in 1873.
By the turn of the century, they were replaced by a series of .303 calibre Lee-Enfield, bolt-action rifles with box magazines.

 

[Bottleship]

Experimental Russian firearms, between small arms and artillery:
1st - KPVB, based on KPV machine gun, 23x115 cartridge. 2nd - new 23 mm rifle. I don't know, it's a 23x115, or, more powerful 23x165 (parent case 30x165 - cartridge of BMP-2 30 mm cannon).


1st - 23 mm rifle

SP-30 - cannon/rifle, 30x165
Unknown large-caliber rifle from Kovrov (23 mm?)

Also, worked at new cartridges:
14.5x132 - for anti-material rifle, range - to 4 km
11.7x88 - Russian analog of .460 Steyr. 32 g bullet.
10.25x97 - I think, Russian analog of .416 Barrett, but, based on 12.7x108.
12.7x114 - based on 14.5x114 case, for replacing of 12.7x108 and 14.5x114 in machine guns.
25 (23?) mm cartridge - based on 14.5x114 case.
Old 14.5x114 (training) and new cartridges:


Experimental cannons:

 

[Forest Green]

Isn't the larger 23mm a 23x152mm?

21-29 MM CALIBRE CARTRIDGES

 

[Bottleship]

Isn't the larger 23mm a 23x152mm?

21-29 MM CALIBRE CARTRIDGES

I have information about work at 23 mm sniper rifle with 30x165 mm case, with new long "bullet", but, I haven't information about work at 23x152 or other old cartridges. 23x152 - between 23x115 and 30x165 cartridges by power, and, military consired this cartridge unnecessary.

 

[Bottleship]

Russian .338 LM rifles:
Semi-auto MOLOT:


Bolt-action, based on ASVK 12.7 mm rifle:


Cartridges 7.62x69 (СЦ-154), 9x69 (СЦ-152) and 12.7x55 (СЦ-130); 9x69 - Russian .338 LM:

 

[Forest Green]

Isn't the larger 23mm a 23x152mm?

21-29 MM CALIBRE CARTRIDGES

I have information about work at 23 mm sniper rifle with 30x165 mm case, with new long "bullet", but, I haven't information about work at 23x152 or other old cartridges. 23x152 - between 23x115 and 30x165 cartridges by power, and, military consired this cartridge unnecessary.

23x152mm was the round used in the ZSU-23-4 AAA.

 

[DWG]

the only significant batch of black-powder rifles bought by the Canadian Army and Northwest Mounted Police were breech-loading .577 Snider Enfields bought in 1873.

As Canada only came into existence with Confederation in the 1860s, the Army missed the time slot for larger calibre Black powder weapons. However the pre-Confederation Militia and Fencibles will have used whatever the British Army handed over, or privately bought weapons (whether individually or by wealthy commanders or benefactors), which undoubtedly would have been larger calibre. The Brown Bess carbine was developed for operations in Canada and definitely equipped Canadian Militia during the War of 1812.

 

[Bottleship]

5.6x45R - experimental cartridge, created by Shpitalniy (one of creators of ShKAS machine gun) at 1930th. Idea - LMG with light cartridge.


5.6x45R (left) with two Soviet 6.5x54R (parent case - 7.62x54R)

...
Fedorov 6.5x57 experimental cartridge, 1913. 3.66 cm cub., bullet 8.3 g (128 gr), 950.4 mps (3118 fps; long rifle barrel - 770 or 800 mm), or 860 mps (2821 fps; short barrel of Avtomat M1916 520 mm barrel), energy 3749 Joules (rifle), or 3068 Joules (Avtomat). Best of Fedorov cartridges (created three size of case - 3.66, 4.3 and 5.66 cm. cub., 6, 6.5 and 7 mm caliber, with three weight of bullet for one caliber, heavy bullets 6 mm - 7 g, 6.5 mm - 8.3 g, 7 mm - 9.63 g).

Fedorov at 1929 projected intermediate cartridge 6.5x40, parent case - 7.63x25 Mauser, overall lenght - between 55 and 60 mm.

 

[Bottleship]

Big Russian revolvers.
OTs-135, or, RSh-12 (Revolver Shturmovoy 12 mm - Assault revolver), newest variant (images from guns.ru):


Cartridge - 12.7x55, special. I haven't data about load, but, it's a bigger than .50 Beowulf and .500 S&W Magnum.
Pestich 1870th experimental signal navy revolver. Weight 9.5 kg (~21 pound), cartridge in 37x94R Hotchkiss case, with powerful flash load, firing - only on special base in a board. Maybe, biggest revolver by caliber.

 

[Rickshaw]

Looks like you're meant to hold it with the butt and use the opposite hand to manipulate the trigger when it is fastened to it's support "board" (or more likely ship's rail).

 

[World B4]

The Prilutsky Model 1914, a self loading pistol meant to replace the Nagant revolver, had WW1 not happened at the time

The first Russian semi-automatic pistol

At the beginning of the last century, leading armies of the world began to receive into service the first examples of self-loading pistols. However, i

weaponews.com

 

[Bottleship]

About early Russian semi-auto pistols and submachine guns
In 1908 in Russia builted experimental full-auto pistol, based on Borchardt-Luger model 1904 and Mauser model 1906. On tests it was a very bad weapons, with very fast rate of fire, very small magazine and very unrealible. And, started work at special system. Engineer Frolov at 1912 constructed full-auto pistol-carbine in 7.62x38R Nagant, fith 20-round magazine. It was a delayed-blowback, rotating-closed system, maybe, earliest Russian SMG, or, grandpa of Stechkin APS
In Izhevsk at 1911, based on details of Browning M1906 pocket pistol, created semi-automatic pistol in 7.62x38R.
But, works at small arms in 7.62x38R Nagant was a closed. Russian army going to new weapon system, with two calibers - 6.5 mm for rifles and 9 mm for pistols. Works at new calibers was a braked by WW1, and not ended.
In 1915 workman of Kuban cossack host Molokov suggested a "light machine gun", named a "Kubanets" - like a Mauser C96, full-auto heavy pistol, in 7.62x38R Nagant, with 33-round magazine. Reaction on this weapon - "Very interesting, but, We can't working on this gun today" - it was a, maybe, hardest period for Russian industry in WW1, and "Kubanetz" was left for later.
Also, in 1915, general N. I. Yurlov proposed weird "small machine gun "Jakob"" - based on Nagant M1895 revolver, belt-fed.
Also, inventor Domanevskiy proposed a "double Nagant" with second barrel, second cilinder, with full load - 14 cartridges. Other Domanevskiy's weird gun - "electrical revolver" - it's a Nagant in 7.62x38R with 7-round cilinder, or in .22 Velodog with 15-round cilinder, in special trunk with lamp.
"Pistole-shahka" - suggested by D. I. Nakvasin, shashka + 7.65 mm Browning pistol with 12-round magazine in handle
"Shashka-machine gun" - suggested by V. I. Lisenko, shashka + 9 mm Browning pistol with 12-14-round magazine
Also, engineer Korovin in 1912 patented a self-loading pistol.
I thread about "Mauser C96 in 7.62x54R". Yes, it's a semi-mithycal gun, "Tsarist's Desert Eagle". I don't know about system, but, I think, it was a sawn-off rifle - maybe, semi-automatic. In France created two "SMG", sawn-off RCS M1917 rifle and Chauchat M1915, with 8-round clip and 20-round mahazine, in 8x50R Lebel, in German created C96 in special 7.63 mm cartridge with case between 40 and 44 mm, with 1.5 g (23 gr) load - and, maybe, analogical weapon constructed in Russia.
And, other semi-mithycal gun... Automatic pistol from early XVIII century. Yes, I know, it's a very weird, but, 1) in Russia in XVII maked a revolver and magazine pistols and muskets, 2) in England in 1664 created automatic gas-operated revolver. Peter I traveled to England and communicated with British sciencists and engineers, and, maybe, he wanted something like a this gas-operated revolver.

 

[Ravinoff]

In 1915 workman of Kuban cossack host Molokov suggested a "light machine gun", named a "Kubanets" - like a Mauser C96, full-auto heavy pistol, in 7.62x38R Nagant, with 33-round magazine.

33 rounds of a rimmed cartridge is gonna require one hell of a magazine for a pistol, though Tokarev did fit 21 in a reasonable-looking mag for the M1927.

"Mauser C96 in 7.62x54R". Yes, it's a semi-mithycal gun, "Tsarist's Desert Eagle". I don't know about system, but, I think, it was a sawn-off rifle - maybe, semi-automatic.

Wrong era for the Tsarist nickname, but possibly this thing? An SVT-40 hacked down into pistol form, with a PPSh barrel shroud welded on. No idea where it came from or who made it, but I'd imagine firing it would be an "interesting" experience. Looks like it'd be effectively a bolt-action though, don't see any sign of a gas system under that shroud.

 

[Bottleship]

Also, about pistols and revolvers:
Korovin double-action semi-auto pistol, 1912, British patent:

Horman (gunmaker in Tula) 1864 experimental revolver, with paper cartridges:

Other revolver of Norman, rifle and shotgun with removable barrels and reusable cartridges (load of cartridge front):

Lenght of smooth-bore 16 mm barrel - 900 mm, lenght of rifle 17 mm barrel - 692 mm, weight with smooth-bore barrel - 3.07 kg. In Tula in 1860th constructed analogical handgun.
N. I. Goltyakov revolver, 1864, project:

Other Nikolay Goltyakov revolver, 1875:

Other revolvers from 1860th:
Selivanov, Bezborodov pin revolvers - variants of Lefacheux revolvers
Wishnevskiy - variant of Lefocheaux revolver, but, with central pin. Small serial produce. Photos of this revolver:

https://forum.guns.ru/forummessage/93/1066355.html

Chagin 1866 pin revolver - light-weight (1.04 kg) six-shot revolver, with hand-operate rotate of cilinder. Cartridge - analog of Wishnevskiy cartridge, caliber - .43, but, I think, it's in Russian system of calculation - .44 S&W revolvers in Russia named a 4.2-line, or .42 caliber, and, I think, Chagin revolver was a .45 caliber, in American system.
Gorynov 1861 percussion revolver - double-action .35 (maybe, .37) caliber revolver, light-weight (1.2 kg), of 19 parts. Six-shot, paper cartridges, cilinder-conical bullets. Gorynov shoot 180 rounds from this revolver, without damage.
Goltyakov (I don't know, who is this Goltyakov - was a many gunmakers with this surname) 1890 revolving rifle - top-break (based on ideas of Russian S&W revolver), .42 Berdan, six-shot.
Kun and Zalybovskiy 1890-1895 revolver - top-break, .44 Russian with smokeless load, lighter than S&W №3.
Rachkov revolver - 1890th, S&W №3 in 7.62x38R Nagant cartridge.
Between 1900-1914 worked at uprades for Nagant M1895. Engineer Zibin (Rus. Зыбин) in 1910 built swing-out revolver with fast extraction of cases.
...
Also, pistols:
Medvedev 1837 - multi-barrel pistol, "load at once on 50 shots"
Yasherov 1848 - pistol "with ingition tube on 12 shots" - I think, "duck paw" pistol (in Russia named a "death hand", "рука смерти")
Grebenskiy 1880 - weird gun, lever-action, with tube magazine, hinged down barrel.
Mosin 1891 - six-barrel .30 cal peperbox.
In 1860-1870th worked at single-shot .60 caliber pistol with CF cartridge, I haven't data about construction and ballistics. Also, tested American Berdan .42 single-shot pistols.

 

[Bottleship]

33 rounds of a rimmed cartridge is gonna require one hell of a magazine for a pistol, though Tokarev did fit 21 in a reasonable-looking mag for the M1927.

Maybe, it was a pan magazine.
Later, gunmaker Nikolayev created SGM in 22LR with 50-round mag:





Also, springless magazine for unknown LMG, 7.62x54R, Kazarin patent, 1933/1967:

Maybe, in "Kubanets" used analogical magazine.
...
Experimental variant of PPSh - pistol handle and experimental magazine:

Also, in 1942/43 created belt-fed PPSh variant with MG34/42 details.
Also, one inventor suggest huge helical magazine for PPSh.
...
Benardos bullets for M1891 rifle, flechettes and tube bullet (right), 1890th:

 

[Bottleship]

Suggest of Iskirskiy, 1915 - light-weight LMG with combine feed - clips of M1891 rifle and belt of M1910 Maxim gun - Russian WW1 minimi in 7.62x54R. Belt-fed system - rotating, closing - double, construction without screws, easy to service.

Rifle/LMG (with full-auto firing), constructed by architech M. G. Kalashnikov, 1916:

You can see - based on M1891 rifle, delayed-blowback, with 14-round magazine, based on ideas of Chauchat M1915 LMG. This rifle was ordered to experimental produce to the Sestroretsk plant in late 1916. Very interesting system for replacement of massive Fedorov system.
...
Other ideas and projects:
- Create 100-round pan magazine for Lewis LMG for aircrafts
- Rebuilding of Lewis LMG and 50-round magazine to 7.62x54R
- Building of shortened 7.62x54R with immersed bullet, for use in Lewis (overall lenght ~69-70 mm)
- Create of LMG based on Maxim M1910 - project of Kabakov, 1913, with deleted water cooling, butt, pistol handle with trigger, box mount, with 200-round belt.
- Create of LMG based on Colt-Browning M1895 - experimental, 1916, butt and drum magazine, with two 100-round belts. Magazine for this LMG:

 

[Bottleship]

Russian works at PDW
5.45x18 experimental
Based on 5.45x18 PSM cartridge, with long light-weight AP bullet.
Data of experimental (PSM) cartridge
Weight of bullet - 1.55 g (2.5 g)
Muzzle velocity - 760 mps (320 mps)
Muzzle energy - 448 Joules (128 Joules)
Overall lenght - 29.6 mm (24.9 mm)
...
4.5x23
Project, lenghtened case of 5.45x18.
Weight of bullet - 1.6 g
Muzzle velocity - 835 mps (280 mm barrel)
Muzzle energy - 558 Joules
Overall lenght - 36 mm

...
9x30 "Grom" ("Thunder")
Cartridge for A. Shevchenko weapons - project of pistol, and "Gepard" SMG. Based on 9x19 and Russian 9x21 cartridges, use bullet from 9x21.
Data of 9x30 in "Gepard" SMG (pistol)
Weight of bullet - 6.5 g
Muzzle velocity - 600-610 mps (500 mps)
Muzzle energy - 1170-1209 Joules (813 Joules)
Overall lenght - ~41 mm
...
6.5x30
Parent case - 9x30 "Grom". Other cartridge, also used in Shevchenko pistol and "Gepard" SMG.
Weight of bullet - to 5 g - maybe, lighter.
Muzzle velocity in pistol - 780 mps, in "Gepard" (based on proportions of 9x30) - 936-952 mps.
Ruslan Chumak told about works of assault rifle with "recoil shifted pulse" in 6.5x30. I haven't data, what is this a system, but, I think, it's not based on Nikonov AN-94 assault rifle.



"Gepard" SMG with 9x30 and 6.5x30:

Project of 6.5/9 mm pistol (850 g, full-auto with 450-550 rpm, 20-round magazine):


...
4.6x30
Small-known project, I don't know, it's a based on 9x30 case, or based on German 4.6x30 H&K cartridge. Double-environment cartridge for pistol for special forces.
...
Unknown ultravelocity cartridge for "Gepard" SMG - 1500 mps (!), maybe, smooth-bore. Maybe, it's a 4.6x30 cartridge with light (1-1.5 g) bullet.
...
5.45x30
Cartridge, or, maybe, two cartridges, one based on 5.45x39 case, shortened to 30 mm, with standart 3.4 g bullet, muzzle velocity 670 mps (415 mm barrel). This - or, other 5.45x30 - used in project of Alexander Shevchenko heavy pistol, gas-operated, hard-closed, early 1990th.
...
9x19 7N31 cartridge
Maybe, most famous Russian PDW cartridge, based on 9x19 Parabellum case, 4.1 g bullet, 600 mps, 738 Joules. Also, based on this cartridge created underwater 4.5/4.6 mm cartridge for GSh-18.
...
.45 ACP Russian
For OTs-69 LMG (and, maybe, for OTs-122 pistol) created .45 ACP overpressure version with supersonic bullet - maybe, Russian analog of .45 Super or .460 Rowland. By my calculations, it's, maybe, 8 g bullet with 600 mps and 1440 Joules.
Photos of OTs-122 pistol - you can see two .45 barrels. Maybe, one - for powerful cartridge, other - for standart.


...
15-15.5 mm Kochkin cartridge
Project of superpowerful cartridge with AP bullet, weighted to 35 g. I haven't data about parent case, ballistics, but, I think, it's more 3 kiloJoules energy - most powerful .50 AE loads is 2.9-3 kiloJoules.

 

[Bottleship]

Extended magazines
For PTRS-41



For SVT, 15-25 round:

32-round boxed:

64-round, based on DT machine gun, for STV/AVT (reconstruction of A. S. Harchenko rifle)
1950, AK experimental magazines
№1 - standart 30-rd
№2 - extended 40-rd
№3 - 50-rd
№4 - 100-rd

1960-70th:
30-rd AKM (right) and experimental 30-rd short

40-rd RPK (left) and 75-rd

 

[Bottleship]

Project of Gatling gun for tanks, in automatic missile defence system. 14.5x114, six barrels, standart rate of fire 10 000 rpm, maximum 12 000 rpm, electic motor.



T-10 with this machine gun:

Slostin 23 mm four-barrel autocannon (1955-1956):



Weight 55-60 kg (121-132 lbs), lenght 1545 mm, cartridge - special short 23 mm, muzzle velocity 860 mps (2822 fps), rate of fire - 3500+ rpm.
Other Soviet Gatling guns:
1935 - SiBeMAS - "Silina Berezina Morozova Aviatsionniy Skorostrelniy", created by Silin, Berezin and Morozov, four-barrel, 7.62x54R, gas-operated, 6000 rpm.
1936-1939 - Blum (Rus. Блюм) machine gun, twelve-barrel, 7.62x54R, electric motor, from 8 600 to 13 000 rpm.
Post-war - I think, 1960th or 1970th - Zhuravlev six-barrel 30 mm cannon, 16 000 rpm - jet-operated (!), destroyed by tests.
Gryazev and Shipunov 45 and 57 mm cannons - semi-mithycal guns, six-barrel GSh-6-45 and four-barrel GSh-4-57. Maybe, It was a guns for heavy assault helicopters or gyrodynes, or for gunships (one of projects based on Il-114). But, 57 mm gun, maybe, was a double-barrel Gast gun - projected AA cannon for navy, with 1000 rpm.

 

[Forest Green]

Project of Gatling gun for tanks, in automatic missile defence system. 14.5x114, six barrels, standart rate of fire 10 000 rpm, maximum 12 000 rpm, electic motor.
View attachment 623114
View attachment 623120
View attachment 623116
T-10 with this machine gun:
View attachment 623113
Slostin 23 mm four-barrel autocannon (1955-1956):
View attachment 623124
View attachment 623122
View attachment 623123
Weight 55-60 kg (121-132 lbs), lenght 1545 mm, cartridge - special short 23 mm, muzzle velocity 860 mps (2822 fps), rate of fire - 3500+ rpm.
Other Soviet Gatling guns:
1935 - SiBeMAS - "Silina Berezina Morozova Aviatsionniy Skorostrelniy", created by Silin, Berezin and Morozov, four-barrel, 7.62x54R, gas-operated, 6000 rpm.
1936-1939 - Blum (Rus. Блюм) machine gun, twelve-barrel, 7.62x54R, electric motor, from 8 600 to 13 000 rpm.
Post-war - I think, 1960th or 1970th - Zhuravlev six-barrel 30 mm cannon, 16 000 rpm - jet-operated (!), destroyed by tests.
Gryazev and Shipunov 45 and 57 mm cannons - semi-mithycal guns, six-barrel GSh-6-45 and four-barrel GSh-4-57. Maybe, It was a guns for heavy assault helicopters or gyrodynes, or for gunships (one of projects based on Il-114). But, 57 mm gun, maybe, was a double-barrel Gast gun - projected AA cannon for navy, with 1000 rpm.

Ideal weapon for a terminator also.

 

[Bottleship]

Ideal weapon for a terminator also

And, DMR for terminator:


Semi-auto, 20x138B, 5-rd magazine, ~1937-1939
And, other terminator gun, constructed by Kondakov, 1937:



37 mm, shell 674 g (1.486 lbs), muzzle velocity 520 mps (1706 fps), energy 91 125 Joules. Full weight 82 kg. Damping system like a PIAT.
"I need you double-barrel gun"

100 mm experimental rocket launcher, 1942
And, Russian humour:




"I can grow sabre from forefinger.
So, you didn't see this guy?"

 

[Bottleship]

Sagakov submachine gun - large-caliber tube bullet (project, 2000th):

Kochkin 15-15.5 mm pistol (project, 1990th):


In Kochkin pistol use a weird damping system, with recoil of all details, with the exception of handle.
...
Two Soviet experimental assault rifles, with high accuracy in single firing.
Nesterov LA-2, 1961:


Based on Kalashnikov AKM and Dragunov SVD, 7.62x39, weight 2.15 kg (4.74 lbs), 600 rpm. Spring moved left.
Dragunov AF, 1970-1980th (with 45-round RPK-74 magazine):

Based on SVD, 5.45x39, range - 1000 metres, more accuracy, than AK-74 and RPK-74 guns.
...
Dragunov SVDA, also named a V-70, 1970:


Full-auto marksman rifle in 7.62x54R, based on SVD, with shorted heavy barrel, bipods, full-auto firing with 700 rpm, range to 1200 metres. You can see two datas about this weapon, weight 4.5 kg and lenght 1179 mm, and, weighg 4.6 kg and lenght 1130 mm - maybe, it's a two variants.
And, 20-round magazines, created for SVDA/V-70 (also, worked at 30-round magazines):

 

[Bottleship]

"Tulyak" pistol - single-shot, two barrels - main, 4 gauge, rifled, 23 mm, and removable additional, 12 gauge. 4 gauge barrel use special 23x81R cartridges, based on 26.5x76R flare pistol cartridge. 23x81R is a~3600 Joules, 80 g (1235 gr) bullet or buck and 300 mps (984 fps).



KS-23K - bullpup pump-action carbine, 23x81R, 6/7-round magazine, serial (top - scheme of standart KS-23):

KS-23M (left top) and KS-23K (right top) in weapons of Russian anti-terror forces.

OTs-28 - other carbine in 23x81R, experimental, 5-round magazine:

Experimental shotgun, created by ZiD in Kovrov (4 gauge smooth-bore, 26.5 mm):

 

[Bottleship]

Unnamed assault rifle, constructed by TsNIITochMash:
You can see this assault rifle with other unnamed weapons - pistol, SMG and sniper rifle.
...
Variant of 43 mm GM-94 grenade launcher with boxed magazine:

Created analogical 4 gauge smooth-bore shotgun, named a SSK-26, Specialniy Strelkoviy Kompleks 26 mm (Special Shoot Complexe).
...

Double-environment cartridge for Russian 9x19 pistols (originally, for GSh-18), with 4.5 mm bullet-needle.
...
9A-91 assault rifle or SMG in 9x39, with experimental light-weight grenade laucher, and small-known 9 mm SMG based on 9A-91, named a A-9 - I don't know, it's a 9x18 or 9x19.

Other SMGs:
Famous PP-19 "Bizon-2" (ПП-19 "Бизон-2")
OTs-22 "Buk" (ОЦ-22 "Бук")
PP-90M1 (ПП-90М1) - two variants, with helical (9x19 64-rd) and boxed magazines.
OTs-39 (ОЦ-39) - 7.62x25 Tokarev, 20-, 30- and 45-rd magazines, 540 rpm, range to 200 m, weight 1.8 kg - remake of PPS-43.

...
Also, unknown Chinese large-caliber revolver (for Chinese terminator):

And, I know what that looks like:

 

[Bottleship]

Experimental Soviet subsonic 7.62x25 with bullet from 7.62x54R 7N1 (standart sniper cartridge in Soviet Army), and standart subsonic 7.62x39:

Data of this 7.62x25 - 9.9 g (153 gr), ~290-295 mps (951-965 fps), 416-431 Joules
Data of this 7.62x39 - 12 g (185 gr), 290-295 mps, 505-522 Joules
Experimental 7.62x28 RG-037 (parent case - 5.45x39):

Data - 10.6 g (164 gr), 290-295 mps, 446-461 Joules
Based on 7.62x28 constructed standart 9x39 (parent case - 7.62x39).
Modern cartridges:
.338 Lobaev Whisper (parent case - 7.62x39) with 9x39:

Also, named a 8.6x39, constructed for DVL-10 bolt-action rifle. Variants:
Sibsonic:
- 16.2 g (250 gr), 310 mps (1017 fps), 778 J
- 19.4 g (300 gr), 310 mps, 932 J
Overpressure, long range:
- 14.6 g (225 gr), 800 mps (2625 fps), 4672 J
I think, very interesting cartridge for heavy assault rifles (between huge ASh-12 in 12.7x55 and 7.62x39 rifles)
.40 Lobaev Whisper (right; patent case - .338 Lapua magnum), with .338 LM:

Also, named a 10.4x45, constructed for DVL-10 M1 bolt-action rifle. Heavy bullet - 27.15 g (419 gr) from .408 CheyTac, 310 mps, 1305 J
Experimental 12.7 mm subsonic cartridge, parent case - unknown shotgun cartridge, bullet - from 12.7x108, 48.6 g (750 gr):

 

[Ravinoff]

Experimental Russian firearms, between small arms and artillery:




SP-30 - cannon/rifle, 30x165
View attachment 621891

Got any more details on that thing? This is the third or fourth time I've seen it, but I have yet to figure out what exactly it's supposed to be. The very generic name and language barrier make it impossible to find. I'm assuming it's something like the old small-caliber infantry guns (37mm Modele 1916 or Vickers-Crayford), or the interwar lightweight antitank guns like the QF 2-pounder.

In return, another Russian oddity: the 6P62. A shoulder-fired, full-auto capable 12.7x108mm rifle designed by the Degtyarev Plant and possibly in limited use with special forces (being a Spetsnaz armorer or ammo handler must be a nightmare).