Boonville, MO – CMMG has announced the release of the MkG45 GUARD – a new AR15 rifle chambered in the iconic .45 ACP caliber. The GUARD is offered in five different configurations, operates on CMMG’s new, patent pending Radial Delayed Blowback system and is fed from Glock magazines.
“With the GUARD, we set out to engineer an affordable, highly reliable AR chambered in .45 ACP that would use the widely-available Glock magazines. In the early stages of design, we tested out a variety of different operating systems, including straight blowback and direct impingement, but none of those options gave us the reliability we were looking for. We ultimately came up with the design for the Radial Delayed Blowback system and from there, all the pieces started falling into place,” said Chris Reinkemeyer, CEO/CFO at CMMG.
While the straight blowback system found on most pistol-caliber AR carbines utilizes a non-rotating bolt assembly, the Radial Delayed Blowback system used on the GUARD has a bolt carrier group (BCG) that appears similar to that found on a direct impingement AR15 but operates completely differently. The rotating bolt is the key to the Radial Delayed Blowback system. It is the act of the bolt being forced to rotate and unlock that slows down the BCG just enough to safely cycle .45 ACP while keeping the BCG and buffer lighter than 9mm AR15’s.
Some advantages that result from this new operating system are that it reduces the overall weight of the rifle and simultaneously decreases the felt recoil by using a lighter bolt and buffer. It also opens up the door to run calibers that have historically been too powerful for straight blowback but weren’t suited for direct impingement.
CMMG also put a high emphasis on having fully functional AR15 controls, including last round hold open. The GUARD features an all new patent pending dual-pinned, fully machined bolt catch linkage. This linkage provides consistent and reliable operation straight out of the box with no need for adjustments or fine tuning. The actuation from this linkage is robust enough that it still uses a standard bolt catch spring.
The MkG45 GUARD comes with one 13-round factory Glock 21 magazine. For optimal reliability, CMMG recommends using factory double-stack GLOCK .45 ACP magazines. Bolt weight kits will be sold separately for those who wish to fine-tune the GUARD for +P ammunition or suppressor usage.
The CMMG MkG45 GUARD is available in the following configurations:
MkG45 GUARD T:
BARREL: 16.1″ 1:16 Twist, Medium Taper 4140 SBN Barrel
MUZZLE: CMMG SV Brake, Threaded .578-28
HAND GUARD: CMMG RKM11
FURNITURE: A2 Pistol Grip, M4 butt stock with 6-pos mil-spec receiver extension
RECEIVERS: Billet 7075-T6 AL Lower, Forged 7075-T6 AL Upper
TRIGGER: CMMG Single Stage Mil-Spec style trigger
WEIGHT: 5.6 lbs (UNLOADED)
LENGTH: 32.5 (STOCK COLLAPSED)
MSRP: $1299.95
CMMG Lifetime Quality Guarantee
CMMG, Inc. will guarantee its products against defects in material or workmanship. CMMG, Inc. will repair, replace or substitute part(s) (at CMMG, Inc. discretion) at no charge to the customer if a defect of material or workmanship is found. All service work must be carried out by CMMG, Inc.
About CMMG:
CMMG began in central Missouri in 2002 and quickly developed into a full-time business because of its group of knowledgeable and passionate firearms enthusiasts committed to quality and service. Its reputation was built on attention to detail, cutting edge innovation and the superior craftsmanship that comes from sourcing all their own parts. By offering high quality AR rifles, parts and accessories, CMMG’s commitment to top-quality products and professional service is as deep today as it was when it began.
