Sig Sauer MPX 9mm Luger Rifle, 16 in Threaded Barrel, Customized Free-Float Handguard, Magpul MOE SL-K Stock, 2x 41rd & 1x 30rd Mags
This U.S.-made Sig Sauer MPX 9mm rifle features a 16-inch threaded barrel, a short-stroke gas piston system with a closed rotating bolt, and a continuous top Picatinny rail. It is customized with an aluminum free-float handguard that has elongated diagonal ventilation slots, skeletonized handstops, and a detachable underside Picatinny segment, plus a ported/linear-comp style muzzle device with a perforated sleeve and end cap. It includes two 41-round and one 30-round translucent MPX-pattern magazines with extended base pads.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There is minor carbon buildup on the muzzle device. There are some scratches and blemishes present. Texturing was added to the rail.
What’s Included
- 2x 41-round SIG MPX-pattern magazines (translucent) with extended base pads featuring a stylized "T" emblem
- 1x 30-round SIG MPX-pattern magazine (translucent) with extended base pad featuring a stylized "T" emblem
- Magpul MOE SL-K adjustable carbine stock (installed)
- Threaded ported/linear-comp style muzzle device with perforated sleeve and end cap (installed)
- Enlarged/add-on magwell funnel (installed)
- Skeletonized handstop(s) mounted on the handguard (installed)
- Detachable Picatinny rail section mounted to the handguard underside (installed)
- QD sling socket on the handguard (installed)
The MPX operating system is semiautomatic with a short-stroke gas piston and a closed rotating bolt. Controls follow an AR-style format, including an AR-pattern rear charging handle, a manual safety, and a two-pin takedown layout. The top rail is continuous across the receiver and handguard for mounting accessories.
The upper and lower receivers are 7075-T6 aluminum with a hard-coat anodized finish. Receiver markings read "SIG SAUER INC NEWINGTON NH USA" and "SIG MPX MULTI-CAL." Country of origin is USA.
The 16-inch threaded barrel is fitted with a ported/linear-comp style muzzle device featuring a perforated sleeve and end cap. The free-float aluminum handguard includes elongated diagonal ventilation slots, an underside QD sling socket, a detachable Picatinny rail segment, and skeletonized handstops. No sights are installed.
Furniture includes a Magpul MOE SL-K adjustable stock on an AR-pattern carbine receiver extension and a SIG-branded polymer pistol grip with a SIG medallion. An enlarged/add-on magwell funnel aids magazine insertion. Capacity is listed at 41+1.
Note: Magazines do not lock the bolt to the rear.



