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The MPX Copperhead features a monolithic Elite Series Cerakote finish upper receiver and a 4.5" barrel with integrated muzzle brake. 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. It features 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.
| Brand | Sig Sauer |
| Category | Tactical Pistols |
| Series | Copperhead |
| Model | MPX |
| Caliber | 9mm Luger |
| Barrel Length Range | 4" to 4.99" |
| Gun Platform | AR-Style |
| Operating System | Gas Piston |
| Capacity | 20+1 |
| Action | Semi-Auto |
| OAL | 14.50" |
| Hand | Right Hand |
| Sights | Optic Ready |
| Barrel Finish | Black |
| Twist | 1:10" |
| Grips | Black Polymer |
| Handguards | M-LOK |
| Receiver Material | Aluminum |
| Safety | Ambidextrous |
| Barrel Description | Carbon Steel |
| Barrel Length | 4.50" |
| Max Capacity | 20 |
| Receiver Finish | Black Anodized |
| Trigger | Timney Single-Stage |
| Weight | 4.50 lbs |
