Sig Sauer MPX Copperhead 9mm Pistol, 3.5″ Barrel, 20rd

The Sig Sauer MPX Copperhead is a compact AR-style 9mm pistol featuring a 3.5 inch barrel and a folding Pivoting Contour Brace. It ships with a single 20‑round polymer magazine and a Coyote Cerakote finish on the receiver. The design uses a monolithic upper and is optic-ready for user-installed sights or optics.

Key Specifications

• The pistol is chambered in 9mm Luger.
• The barrel measures 3.5 inches.
• Magazine capacity is 20 rounds.
• Overall length is 14.5 inches.
• The action is Semi-Auto.
• The finish is Coyote Cerakote.
• The barrel material is Carbon Steel.
• Includes (1) 20-round polymer magazine.
• Stock is a Pivoting Contour Brace (folding PCB).
• The platform features a monolithic upper receiver.

Designed for compact AR-style applications, the MPX Copperhead provides a short-barrel 9mm configuration that fits transportable range use and close-quarters training scenarios. The factory short-stroke gas piston system supports consistent function across a range of 9mm loads, while the folding brace and optic-ready rail allow straightforward customization for common shooting needs. The MPX Copperhead presents a factory-configured, compact 9mm AR pistol option for shooters seeking modularity and a reduced footprint.