SIG Sauer MPX Carbine 9mm Luger, 16-Inch Hammer-Forged Barrel, Short-Stroke Gas Piston, Ambidextrous Controls, KeyMod Handguard
This SIG Sauer MPX Carbine stands out with its uncommon closed-bolt, short-stroke gas-piston system in a 9mm platform and a rotating bolt for dependable operation. It features a 16-inch hammer-forged barrel with a flash hider, a free-float aluminum KeyMod handguard with a continuous top Picatinny rail, and a two-rod telescoping/collapsible stock that slides into the proprietary MPX rear receiver block (non-1913). The receiver is Exeter, NH-marked, and the carbine includes ambidextrous safety and magazine release controls, plus installed flip-up iron sights.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: The firearm is in overall good shape with scuff marks and finish wear from handling throughout. The bore is clean and shiny.
What’s Included
- SIG Sauer MPX Carbine 9mm rifle
- 1x 35-round SIG Sauer MPX polymer magazine
- Flip-up front and rear iron sights (installed)
The MPX operating system is notable: a closed-bolt, short-stroke gas-piston design with a rotating bolt, uncommon in 9mm carbines. This configuration delivers consistent cycling with a design tailored for pistol-caliber use.
The 16-inch hammer-forged barrel is capped with a flash hider. Factory flip-up front and rear iron sights are installed and ready to use.
Controls are fully ambidextrous, including the safety and magazine release. A case deflector is present, and the design omits a forward assist. The two-rod telescoping, collapsible stock mounts to the proprietary MPX rear receiver block (non-1913) for straightforward length adjustment.
The aluminum alloy receiver pairs with a free-float aluminum KeyMod handguard, providing rigidity and accessory mounting options. A continuous top Picatinny rail spans the receiver and handguard, and a scope mount interface is integral.
This USA-made carbine features an Exeter, NH-marked receiver. Capacity is 35+1, and it includes one 35-round SIG Sauer MPX polymer magazine.