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SIG SAUER MPX Copperhead 9mm Pistol w/ Brace - 3.5"

Pistol Caliber Carbine

Out of stock

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The MPX Copperhead features a monolithic Elite Series Cerakote® finish upper receiver, with an integrated stock knuckle lower, and 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 with 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.


  • CALIBER 9mm Luger
  • OVERALL LENGTH 14.5 in (368 mm)
  • OVERALL WIDTH 2.4 in (61 mm)
  • HEIGHT 8 in (203 mm)
  • BARREL LENGTH 3.5 in (89 mm)
  • WEIGHT 4.5 lb (2 kg)
  • TWIST RATE 1:10
More Information
Product Type Pistol Caliber Carbine
Manufacturer Sig Sauer
Barrel Length 3.5"
Caliber 9mm