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

Galco Revenger Sb7 Belt Review 1
Galco Revenger Sb7 Belt Review 1

Review: Galco Revenger Holster & SB7 Gun Belt

For those who choose to carry a finely finished, K-frame revolver, Galco offers one of its finest concealed-carry setups in the form of its Revenger holster and SB7 gun belt.

Rimfire Power: The Primary Arms CLx 1-6x24 mm Riflescope with ACSS 22LR G2 Reticle

Low-power variable optics have become popular options for today's AR-15s and other modern sporting rifles, and Primary Arms now offers an option tailored for rimfire versions of those same guns.

Gun of the Week: Walther Arms PDP F-Series Pro-X PMM

One of Walther Arms' recent introductions combines the features of several other PDP handguns, meaning the Walther PDP F-Series Pro-X PMM is packed with a number of different design elements.

The Armed Citizen® Oct. 30, 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.

President's Column | Your Input is Valued

I wish to thank all our members who have sent me e-mails these last 12 months. I’m doing my best to keep up with all your e-mails, but please be aware it seems I’m always 300 to 400 e-mails behind. I want to reiterate that I am reading them all as fast as I have time for.

Building an X-Card Gun for Turkey Shoots

Unofficially known as a “turkey shoot,” X-Card competition challenges shotgunners to place shot pellets as closely as possible to the center of a target. And some makers have perfected a way to fine-tune shotguns for this purpose.

Interests



Get the best of American Rifleman delivered to your inbox.