M2HB with simfire and airsoft mounted on a JEEP YJ. It´s used as a fast attack vehicle at milsim events. The simfire uses propane and oxygen to create a loud bang and muzzle flash. A M249 airsoft mechbox is also installed in the gun.
This setup offers fast infil and exfil and alot of firepower when the shit hits the fan.

M2HB on Fast Attack Vehicle

M2HB simfire at night big muzzle flare