The distinguishing MPX Copperhead features are the 3.5” barrel, monolithic upper receiver with an integrated stock knuckle lower and SIG Sauer Pivoting Contour Brace (PCB).

The MPX Copperhead comes equipped with the new, rapid deploy SIG SAUER Pivoting Contour Brace (PCB) giving pistol users a brace that easily adapts to the movement of the shooters arm with a ...

The SIG MPX-SD is integrally suppressed with new SIG SAUER silencer technology designed specifically for the SIG MPX-SD. A compact variant, the SIG MPX-K, is available with a 4.5” barrel.

Sig Sauer’s new short-barreled MPX Copperhead submachine gun was made public at the 2019 SHOT Show, a firearm industry trade event held in January 2019 in Las Vegas, Nevada.

When SIG Sauer introduced the popular modular SIG MPX submachine gun in 2014, it hinted that a carbine model was in development. We’ve just gotten word that the long-awaited SIG MPX 9 mm semi ...

(U.S. Air Force photo by Tech. Sgt. Joseph Swafford Jr./Released) Sig Sauer will release the SB-X stabilizing brace along with the commercial release of the MPX pistol (shown below) in July, 2014.

SIG SAUER just released the enhanced MPX Pistol Caliber Carbine, redesigned and upgraded for performance shooting sports, and to fulfill the needs of competitive and professional shooters alike.