CMMG Mk 45 Guard

The CMMG Mk 45 Guard is a .45 ACP carbine developed by CMMG. The weapon is an M16 derivative and uses a radial delayed blowback operation.[1][2]

CMMG Mk 45 Guard
TypeSubmachine gun
Place of originUnited States
Production history
Designed2017
ManufacturerCMMG
Specifications
Cartridge.45 ACP
ActionRadial delayed blowback
Feed systembox magazine

Overview

The MkG45 Guard is a .45 ACP calibre, radial delayed blowback carbine. This system uses the rotation of the bolt head to accelerate the bolt carrier of an AR-15 pattern rifle. The bolt locking lugs are adapted to incorporate angles that rotate the bolt as it travels rearward under conventional blowback power. As the bolt rotates, it must accelerate the bolt carrier to the rear through an adapted cam-pin slot. This acceleration amplifies the effective mass of the bolt carrier, slowing the speed of the bolt head. 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.

References
  1. "CMMG MkG45 Guard Rifle - PCC in .45 ACP -". 2 May 2017.
  2. "MkG45 GUARD: CMMG Unleashes New AR-15 in .45 ACP". 26 April 2017.
  3. "CMMG Mk45". Archived from the original on 2018-10-08. Retrieved 2018-10-08.


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