Sig Sauer MPX Copperhead K 9mm

The Sig Sauer MPX Copperhead K 9mm features a monolithic Elite Series Cerakote®, with an integrated stock knuckle lower. A 3.5” barrel with integrated muzzle brake. The MPX Copperhead comes equipped with the new SIG SAUER. Pivoting Contour Brace (PCB) giving pistol users a brace that easily adapts to the movement of the shooter’s arm. As such provides a patented swivel operation for perfect placement, and can be rapidly deployed.

Unconventional design, unmatched performance, and familiar AR handling. The SIG MPX redefines the submachine gun category with a new level of operator safety, in-field adaptability, and proven reliability in the harshest environments. Completely ambidextrous, the SIG MPX is great for left- or right-handed shooters with its dual-sided selector switch, magazine release, charging handle, and bolt release. The SIG MPX operates from a fully-closed and locked rotating bolt, offering enhanced reliability and safety in use. A short-stroke gas piston allows the SIG MPX to run all weights and brands of 9mm ammunition with no adjustments to the gas valve.

An existing compact variant, the MPX K, cut that down further with only a four-and-a-half-inch barrel. Copperhead has a three-and-a-half-inch barrel and an overall length of just 14.5-inches. It’s also narrower than the standard MPX and has a shortened pistol grip, making it easier to conceal in a bag or under a coat.

The Copperhead is an ultra-compact variant of the MPX. It’s the smallest MPX variant to date, and likely the smallest in the braced pistol PCC out there. SIG took the MPX and did everything they could do to shrink the MPX beyond even the K model. The Copperhead incorporates a monolithic upper.