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

Armed Citizen Podcast John Lott 1
Armed Citizen Podcast John Lott 1

Why the Murder Rate Quickly Fell to a Likely Historic Low

If the gun-control Left is to be believed, then the murder rate in the U.S. should be going up. After all, gun sales and ownership rates have been rising for the last few decades and anti-gun groups claim that gun ownership is the cause of violent crime. This, of course, is nonsense.

16 New Bolt-Action Rifles for 2026

From cutting-edge precision rifles designed for competition or hunting to traditionally styled guns that emulate designs from yesteryear, 2026 saw the introduction of an incredible array of bolt-action rifles.

Review: Chiappa Rhino 60DS 10 mm Auto

The Italian-designed-and-manufactured Chiappa Rhino remains unique today as the only current revolver with the barrel mounted at the bottom of the frame, firing from the chamber at the 6-o’clock position.

5 New Large-Format Pistols for 2026

There's been a huge surge in the large-format pistol category, and 2026 continues to showcase new models answering the wants and needs of today's firearm owners.

Short & Powerful: The EOTech Vudu 4-12x36 mm Super Short Riflescope

EOTech's ultra-compact 3-9x32 mm Vudu was a popular addition to the company's variable-powered riflescope line, and the new 4-12x36 mm Vudu ups the ante with new features in a still-compact package.

The Armed Citizen® May 11, 2026

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

Interests



Get the best of American Rifleman delivered to your inbox.