Grumman Ranger Missile system

[Pioneer]

Once again, I've come across this 'official' Grumman 'Ranger' missile cutaway desktop model, which I've never seen or heard of before.

On the page it's from, it states
Grumman 'Ranger' Infantry Heavy Assault Missile

(https://www.bonhams.com/auctions/25262/lot/19/?category=list)

Anyone know anything about this program?

Regards
Pioneer