We’re reporting on two sides of Sig today. The first, their new P220 in 10mm, demands attention. There’s virtually no way to ingore the gun, as I discovered on the range during the SHOT Show. It is loud. On the quiet side, Sig’s new MCX rifle family chambered in 300 AAC Blackout is going to cause quite a stir.
I love the 300 AAC Blackout for its versatility and the fact that it’s just plain fun. These rifles take that fun and utility to a whole new level. Other calibers including 5.56mm and 7.62×39 will be offered too, but I think the Blackout is the one to use on this platform. The rifle was designed for the 300 Blackout by using an auto-regulating piston gas system, so function and reliability are maintained across the wide variety of ballistic choices both suppressed and unsuppressed. Migrating 300 Blackout support to an existing platform can be problematic as getting gas and recoil balance right supersonic, subsonic, suppressed and unsuppressed is quite a feat.
Affectionately called “The Black Mamba” by a growing number of people inside and outside of Sig, the CMX leaves the gates with three primary configurations. The rifle features a 16-inch barrel and a choice of four stock options: a low profile, side-folding skeletonized stock, a telescoping stock, a tubular side folding stock or a folding telescopic stock. The short barrel rifle version (NFA item) comes with a 9-inch barrel and the same choice of stocks. The pistol version features a side-folding SBX Pistol Stabilizing Brace.
What’s in common across the line is modularity. Barrels can be easily swapped between 9 and 16-inch versions and caliber change is an easy operation, calling for a new bolt face in the case of 7.62×39. All models also offer standard upper compatibility so new uppers can migrate legacy lowers. Key mod rails, full-length Picatinny rails on top and iron sights round out the packages.
I shot the MCX SBR with the new Sig SRD762 QD silencer and Sig’s 300 Blackout 220 grain subsonic. Oh boy. I don’t often gush, but I sure did with this package. It probably didn’t hurt that one of the many MCX rifles I fired that day came with a full-auto happy switch. Recoil is virtually non-existent, bordering on generation of an anti-recoil field. Noise? There is none. Well, OK, a little, but not much. Most of what you hear is the thump, thump, thump of those big heavy rounds hitting the target.
The SIG MCX rifle carries an MSRP of $1,866, while the SBR variant has an MSRP of $2,058. The pistol with side-folding SBX has an MSRP of $2,132.