Built around the MPX platform, the SIG Sauer MPX Copperhead is a compact 9mm pistol suited to PDW-style applications and range use. It features a monolithic coyote Cerakote upper and a 3.5-inch carbon-steel barrel for compact handling. The firearm employs a short-stroke gas piston operating system and ships with the SIG Pivoting Contour Brace (PCB) and one 20-round polymer magazine. Controls and components are configured for straightforward handling and in-field adaptability.
Key Specifications
- Chambered in 9mm.
- The barrel measures 3.5 inches and is made of carbon steel.
- Overall length is 14.5 inches.
- The weight is 4.5 lb (72 oz).
- Includes one 20-round polymer magazine.
- Operating system is a short-stroke gas piston.
- Action type is Semi-Auto.
- Upper receiver finish is coyote Cerakote with a black barrel finish.
- Stock is a Pivoting Contour Brace (PCB).
- Rate of twist is 1-in-10.
Compact dimensions, durable finishes, and an established operating system make the MPX Copperhead a practical choice for shooters who need a short-barrel AR-style pistol with modern handling features. Its design emphasizes straightforward operation and modular ergonomics to support range use and duty-style applications where allowed. Built with SIG Sauer’s MPX family fundamentals, the Copperhead balances compact form with practical controls and accessory compatibility.
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