SIG Sauer MCX Carbine

by
posted on January 20, 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. **

SIG Sauer introduced its new modular carbine platform, the MCX, which will be available to the commercial market in semi-automatic rifle, short-barrel rifle and pistol variants. All three configurations will be available in .300 Blackout, 5.56x45 mm NATO and 7.62x39 mm, with caliber conversions available immediately. Converting from one chambering to another can be performed easily by the user in the field, as switching between .300 Blackout and 5.56 NATO requires only that the barrels and operating rods to be swapped out, and converting to or from 7.62x39 mm simply involves an additional bolt face change. The MCX shares several features with the AR-15, and indeed, the MCX’s upper is compatible with mil-spec AR lowers, however, SIG’s new gun does not require a buffer tube, allowing for the utilization of side-folding stocks. Designed from the ground up for optimal performance with the .300 Blackout cartridge through a silencer, the MCX can run supersonic on the silenced setting without damaging the firearm or negatively effecting function. The rifle configuration will sport a 16” cold-hammer-forged barrel, while both the SBR and pistol variants will feature a 9” barrel.

Latest

Tisas PX-5.7 FO
Tisas PX-5.7 FO

Review: Tisas PX-5.7 FO

The idea that a faster-moving, lightweight projectile can do the same work as a heavier, slower-moving slug has been around for ages, and the math clearly supports it, even if some in the general public don’t.

NRA Awards Grand Scholarships To 2024 Y.E.S. Students

The Y.E.S. program—which launched in 1996—is held each summer in Washington, D.C., and brings together high-achieving high school students from across the country for a week of immersive learning focused on the U.S. Constitution, Bill of Rights and American government.

Rifleman Q&A: Ford Parts For A Smith-Corona

"My wife and I were celebrating our first child when a gentleman came up to our yard as the party was underway and asked about an old wretched Ford pickup that I intended to restore."

Mossberg 990 Aftershock: Not Just An “Other” Firearm

Following on the success of its shotshell-chambered, pump-action Shockwave, with its 990 Aftershock, Mossberg brings to market a similar package with a semi-automatic action that offers even more speed and convenience.

The Armed Citizen® Aug. 4, 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.

Report Highlights Declining Residental Firearm Thefts, Growing Vehicle Firearm Thefts

“The rate of guns reported stolen from motor vehicles increased by 31% over the period,” a Council of Criminal Justice report states, “while the rate of guns reported stolen during residential and commercial burglaries dropped by 40%.” 

Interests



Get the best of American Rifleman delivered to your inbox.