KRISS Super V is the lastest technology of submachine gun design. Its operating systems is a all new design in more than 120 years of firearm age. Although it's firing .45 ACP rounds, it has very low recoil even at automatic mode. The system claims to compensate for recoil by utilizing moving parts that travel down into a recess behind the magazine. This means they travel vertically and forces encountered when they reach the end of their travel act downward, reducing muzzle rise. The barrel is also in-line with the shooter's shoulder as in the M16 rifle and German FG42 but also in line with the shooter's hand. Combined, these factors are advertised to create less felt-recoil and muzzle climb.