CMMG Mk3
CMMG Inc. · Battle Rifle · In Production · 2014
Also known as: Mk3 CBR, Mk3 Carbine Battle Rifle
Overview
The CMMG Mk3 is an AR-10 / SR-25-pattern semi-automatic battle rifle chambered in 7.62x51mm NATO, introduced in 2014. It uses a direct gas impingement operating system with a billet 6061-T6 aluminum receiver set, a 416 stainless steel salt-bath nitride barrel, and an RKM15 KeyMod free-float handguard. Marketed in carbine-battle-rifle (CBR) and 3-Gun (3GR) trims, it feeds from SR-25/DPMS-pattern .308 magazines.
Specifications
| Weight (empty) | 4080 g (143.9 oz) |
| Weight (loaded) | 4536 g (160.0 oz) |
| Barrel Length | 406 mm (15.98") |
| Action Type | Gas Operated Direct Impingement |
| Firing Mechanism | Hammer Fired |
| Trigger Type | Two Stage |
| Magazine Capacity | 20 rounds |
| Magazine Type | Detachable Box |
| Effective Range | 800 m (875 yd) |
| Barrel Rifling | Right Hand |
| Rifling Twist | 254 mm (10.00") |
| Frame Material | Aluminum |
| Barrel Material | Stainless Steel |
| Stock Material | Polymer |
| Finish | Hard Anodized |
Calibers
- 7.62x51mm NATO · primary · 7.62x51mm NATO — also known as .308 Winchester, 7.62mm NATO, 7.62x51mm
Features
- Firing modes: Semi Automatic
- Feed systems: Detachable Box Magazine
- Safety mechanisms: Manual Thumb Safety
- Features: Direct Gas Impingement, Rkm15 Keymod Free Float Handguard, Sv Muzzle Brake, Salt Bath Nitride Barrel, Magpul Acs L Collapsible Stock, Free Float Barrel, Billet Aluminum Receiver
Variants
- CMMG Mk3 CBR — Carbine Battle Rifle
- CMMG Mk3 3GR — Competition
Production
Production years: 2014-present
Origin
Country of origin: United States
Notes
Higher trims ship with a Geissele SSA two-stage trigger; base models use a CMMG single-stage mil-spec trigger. Overall length is variable due to the Magpul ACS-L collapsible stock. Muzzle velocity and effective range are not manufacturer-published and reflect caliber-typical values.
Background
CMMG launched the Mk3 .308 platform and the Mk47 Mutant (an AK-magazine-fed AR) in the same banner year of 2014; the company itself began in 2002 in an outbuilding on the Overstreet family farm in Missouri before growing into a major AR maker.