For the past decade, CMMG has delivered precision-machined AR rifles known for their exceptional function, accuracy and reliability. The latest rifle to embody these features is the CMMG Mk4 RCE, available in 5.56x45mm NATO or .300 AAC Blackout.
The Mk4 RCE is one of CMMG’s premier 2014 rifle models. At its core is an M4 upper receiver and an AR15 lower receiver – both forged from 7075-T6 aluminum. The barrel is a matte finished 416 stainless steel 16” barrel with 1:7 rifle twist. The Mk4 RCE weighs just 6.5 pounds unloaded and weighs 7.5 pounds with a fully-loaded 30-round PMAG. It is 33 inches long with the stock collapsed and is 36 3/8 inches in length with the stock extended.
The RCE includes an RKM14 KeyMod free-floating hand guard with a 1913 Picatinny rail on top. The KeyMod slots are found at the 3, 6 and 9 o’clock positions and offer shooters a low-profile mounting alternative to the M1913 Picatinny rail. For accessories that are not yet KeyMod compatible, users can purchase a separate CMMG 5-slot Picatinny adapter rail that can be easily attached to any of the KeyMod slots for optimal placement of the accessories.
The Mk4 RCE is equipped with a CMMG SV muzzle break that helps to reduce recoil and increase muzzle control for quick and manageable follow-up shots. The muzzle break is built from nitride finished 4140 steel and is able to withstand harsh conditions while providing steady and consistent muzzle rise compensation.
By partnering with other industry leaders, the Mk4 RCE has some of the best components available to complete the rifle. Some of these parts include a Geissele Automatics SSA 2-stage trigger, a Magpul CTR adjustable stock and Magpul MOE pistol grip and trigger guard. One Magpul PMAG with a 30-round capacity is included with the rifle.
CMMG Mk4 RCE Specifications:
Caliber: 5.56x45mm NATO / .300 AAC Blackout
Barrel: 16″ medium weight tapered profile, 416 stainless steel, 1:7” twist
Muzzle: CMMG SV muzzle brake, Threaded ½-28
Hand Guard: CMMG RKM14 KeyMod hand guard
Upper Receiver: Forged 7075-T6 AL M4
Lower Receiver: Forged 7075-T6 AL AR15
Trigger: Geissele Automatics SSA 2-stage trigger
Furniture: Magpul MOE Pistol Grip & CTR butt stock
Weight: 6.5 pounds (unloaded), 7.5 pounds (loaded with 30 round PMAG)
Length: 33 inches (stock collapsed), 36 3/8 inches (stock extended)
Magazine: 30rd Magpul PMAG
Image courtesy CMMG