Sig Sauer MPX P-PSB 9mm AR Pistol, 8" Threaded Barrel, Short-Stroke Gas Piston, Folding SIG Brace, Flip-Up Sights, 30+1, With 4 Magazines and Case
This Sig Sauer MPX P-PSB stands out for its proven short-stroke gas piston system, 8-inch threaded barrel, and SIG-branded left-folding stabilizing brace on a 1913 rear interface. It features a full-length top Picatinny rail that runs continuously across the receiver and free-float handguard, with factory flip-up iron sights. It comes well-equipped with four 30-round factory MPX magazines, the SIG factory hard case, and original paperwork and accessories.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Minor scratches and small blemishes are present. There is localized finish wear on the handguard rail where an accessory was previously mounted.
What's Included
- SIG Sauer factory hard case
- 4x 30-round factory SIG Sauer MPX polymer magazines
- SIG MPX owner's manual
- SBX/SB15 brace instructions
- Trigger compatibility card
- Adjustable sling
- 1913-rail sling adapter (in packaging)
- Bolt-on Picatinny rail sections (installed on handguard)
- Cleaning kit
The MPX operating system uses a short-stroke gas piston with a multi-lug rotating bolt, delivering smooth cycling in a compact 9mm platform. AR-style controls, including the selector and bolt catch, provide familiar handling.
The pistol configuration includes a SIG-branded stabilizing brace mounted on a left-folding hinge with a rear MIL-STD-1913 rail interface. This setup enables compact storage while maintaining a solid mounting point.
An 8-inch threaded barrel pairs with a removable multi-port/flash-hider device. The free-float aluminum handguard features diagonal slots and bolt-on rail sections at 3, 6, and 9 o'clock, while a full-length top Picatinny rail runs continuously across the receiver and handguard.
Factory flip-up front and rear iron sights are installed. The aluminum receiver and frame keep weight manageable and durability high, and the pistol is marked SIG SAUER INC. EXETER-NH-USA with model markings including SIG MPX and SIG MPX MULTI-CAL.
Chambered in 9mm Luger with a 30+1 capacity, this MPX P-PSB arrives complete with four factory magazines and a comprehensive accessory set, making it ready for range use and straightforward setup.