CMMG MkG
The weapon is an M16 derivative and uses a radial delayed blowback operation.[1][2] The MkG is a .45 ACP caliber, radial delayed blowback carbine.The bolt locking lugs are adapted to incorporate angles that rotate the bolt as it travels rearward under conventional blowback power.This delay allows pressure to drop prior to extraction without the penalty of a heavier bolt carrier assembly.[3] The system is similar to roller and lever-delayed blowback in that it uses the mass of the bolt carrier moving at a faster rate than the bolt head to delay the action from opening.