Gun of the Week: CMMG Mk4 RCE

by
posted on June 23, 2014
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **

CMMG introduced the Mk 4 RCE this year as one of the company’s premier new rifles. It features a 16 inch 416 stainless steel, medium-taper-profile barrel and is available in 5.56 NATO and .300 AAC Blackout. The rifle comes equipped with the company’s proprietary SV muzzle brake and RKM14 KeyMod handguard, which allows for all kinds of customization options. The Mk 4 RCE also comes with a Geissele SSA 2-Stage trigger, Magpul’s MOE pistol grip, MOE trigger guard and CTR buttstock as standard features.

What stands out on the RCE, of course, is the new KeyMod fore-end. This relatively new modular system allows plenty of customization without the need for full rails. Accessories can be added precisely where the shooter can best use them, with minimal tools needed. KeyMod-friendly items thread directly into the system, while 1913-style Picatinny rails can be attached for everything else. It’s a tidy, useful system that really opens up how lights, lasers, foregrips and other attachments can be added to an AR-15 style rifle.

Technical Specifications:

Caliber: 5.56mm/300 BLK
Barrel: 16.1" medium weight taper profile
Muzzle: CMMG SV brake, threaded 1/2-28
Hand Guard: CMMG RKM14 KeyMod hand guard
Furniture: Magpul MOE pistol grip, MOE carbine stock
Receiver: Forged 7075-T6 AL M4 type upper, AR15 type lower
Trigger: Geissele Automatics SSA
Weight: 6.7 lbs. (unloaded)
Length: 34” (Stock Collapsed)
MSRP: $1,399.95

Latest

Colt 1860 Army Ihtog 1
Colt 1860 Army Ihtog 1

I Have This Old Gun: Colt 1860 Army Revolver

For the Union Army during the American Civil War, its officers and cavalry troopers relied on one of Colt's most notable firearms: the 1860 Army revolver.

An Affordable Micro-Compact: The Derya Arms DY9Z

The new Derya Arms DY9Z not only fits into the “micro-compact” class of defensive handguns, it adds another adjective: affordable.

Product: Ruger Red Label III Shotgun

Ruger launches the latest iteration in its traditional Red Label shotgun line.

Preview: Ballistol Anniversary Box

Ballistol is one of the most versatile cleaning solutions available on the market, and, in 2025, the company celebrated 120 years in business, with 30 of those years as Ballistol USA.

Review: Savage Stance XR

Savage Arms reworked its Stance pistol in 2025 to incorporate desirable features not available in the first iteration, resulting in the new Stance XR.

Preview: Die Free Kung Fu Grip

A replacement pistol grip for AR-10/15-pattern rifles, the Kung Fu Grip from Die Free Co. utilizes a reduced (12 degree) grip angle that makes shooting a gun with a short length of pull much more comfortable on the wrist—making it an ideal choice for practitioners of modern, squared-up shooting stances.

Interests



Get the best of American Rifleman delivered to your inbox.