SIG MCX Rifle in 5.56 mm Now Shipping

by
posted on September 14, 2015
** 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. **
sig1198_1_mcx_carbine.jpg

SIG Sauer's modular SIG MCX rifle, announced at the 2015 SHOT Show, is now shipping in 5.56 mm caliber, with chamberings in .300 Blackout and 7.62x39 mm to soon follow. Three variants of the rifle will be available to the commercial market: semi-automatic; short-barrel rifle (SBR); and pistol configurations. A full line of conversion kits and accessories will also be available soon. Additionally, in an effort to educate consumers about the MCX, the manufacturer has created a series of webisodes to introduce viewers to the experts and engineers behind the modular rifle, the requirements that guided its design, and the benefits and advantages of the platform.

“This is not an ‘AR’. This is the new standard in modern rifle systems,” said John Brasseur, Director of Product Management for SIG Sauer, Inc. “We’ve brought the minds behind the SIG MCX to the forefront to talk about the development, from the drawing board to production.”

The SIG MCX was designed for optimum short-barrel performance with the .300 Blackout cartridge and a silencer, which ultimately offers superior suppression capability and enhanced reliability with both supersonic and subsonic loads.

Sharing a modular design with the SIG MPX, the MCX is mission-adaptable, allowing barrels, handguards and stocks to be swapped in the field in a matter of minutes. Changing between 5.56 NATO and .300 Blackout is as simple as swapping barrels and operating rods. Conversion to 7.62x39 mm simply requires an additional bolt face change. Barrel lengths can also be changed, with 16" and 9" versions initially available. A two-position gas system makes the transition from subsonic to supersonic seamless. In combat situations, the MCX can run supersonic on the silenced setting without damaging the firearm or negatively impacting reliability.

Other features offered include a unique recoil assembly that does not require a buffer tube, allowing for side-folding stocks. A full-length Picatinny top rail allows for the mounting of lights or optics. Removable SIG Sauer iron sights are standard. The lower receiver offers familiar AR-style controls, with an ambidextrous selector and mag release as standard. The upper is compatible with Mil-Spec AR-15 lowers and, with the use of a SIG MCX Stock Kit, allows consumers to fully upgrade their legacy system.

The rifle variant will feature a 16" cold hammer-forged barrel, while the SBR will come with a 9" barrel. Both will offer a choice of four stocks: a low profile, side-folding skeletonized stock, a telescoping stock, a tubular side folding stock, or a folding telescopic stock. The pistol variant will feature a 9" barrel and a side-folding SBX Pistol Stabilizing Brace.

Fore more, please visit sigevolution.com or sigsauer.com

Latest

SIG P211 01
SIG P211 01

New For 2025: SIG Sauer P211-GTO

SIG Sauer introduced its first hybrid-frame, 2011-style pistol at its 2025 NEXT product launch event, and the P211-GTO blends features from the M1911 with design elements from the P320.

Sellmark Breaks Ground On “Verdexium” Project

In an effort to reduce reliance on international supply chains and bolster domestic manufacturing, Sellmark Corp.—parent company of the Sightmark, Pulsar, Inforce, Kopfjäger, Firefield, BulletSafe and Dark 30 brands—has broken ground on a new manufacturing complex in Mansfield, Texas, that it calls a “transformative force for American-led growth and innovation.”

Gun Of The Week: Heritage Manufacturing 92

American Rifleman staff are on the range with one of the most iconic lever-actions ever created, except this one has a bit of a plot twist—it is a model made overseas and imported by Heritage Manufacturing.

The Armed Citizen® July 25, 2025

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

Victory In The Air: One Smith & Wesson Victory Revolver's Story

A primary source investigation into the service history of a Smith & Wesson Victory revolver used by the U.S. Navy in the Pacific Theater during World War II.

Firearm Industry Responds To Aid Texas Flood Victims

Only a few days after the tragedy struck, two of the firearm industry’s foremost companies were raising funds for the victims and organizations dedicated to providing support through devastating floods in Texas.

Interests



Get the best of American Rifleman delivered to your inbox.