Found this:
"Initially intended only for use by the Multi-Mission Cutter Helicopter (MCH), a further enhancement of the HH-65C within the USCG's Deepwater effort, which could include the installation of a flight deck recovery system, further transmission enhancements, 10-blade low-noise Fenestron, relocated avionics, enhanced fuel capacity, a digital autopilot, and an increased 10,000 lb (4,500 kg) M.T.O.W.
The MH-65C designation is now also applied to HH-65Cs used in 'airborne use of force' missions, such as the Helicopter Interdiction Tactical Squadron (HITRON) mission taken-up by the MH-65C in early 2008. The HITRON aircraft are armed with the Barrett M107CQ 12.7 mm anti-material rifle and M240B 7.62 mm machine gun."
HTH! Mark