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

Stoeger STR-9 Thinline+ pistol
Stoeger STR-9 Thinline+ pistol

New for 2026: Stoeger STR-9 Thinline+ Pistol

Stoeger refines its STR-9 Thinline pistol to be even easier to carry.

Finding The Natural Point Of Aim

Nearly every shooter understands the basic principles of marksmanship: position, grip, sight alignment, breathing, trigger control and follow-through.

Firearm Ownership Reaches New Record

The NSSF estimates there are more than 32 million modern sporting rifles in circulation.

Preview: Hornady 12th Edition Reloading Manual

While the internet offers quick access to information, trusting unvetted recipes for cooking up ammunition is less than ideal, which is why makers of reloading products like Hornady publish thorough books for such tasks.

Review: Bushmaster V-Radicator

The business of dispatching unwanted critters requires a platform capable of a high degree of accuracy. Nuisance animals such as prairie dogs are both small and skittish in nature, meaning that they tend to keep their distance and scurry away upon the arrival of incoming fire.

New for 2026: Smith & Wesson FPC in 5.7x28 mm

The folding carbine line expands to include the 5.7 mm chambering.

Interests



Get the best of American Rifleman delivered to your inbox.