SIG Sauer SIGM400 AR-15 Pistol, 5.56 NATO, 11.5 inch Barrel, SB15 Brace, Magpul FDE Furniture, A2 Front/MBUS Rear Sights
This SIG Sauer SIGM400 AR-15 pistol pairs an 11.5 inch 5.56 NATO barrel with dependable direct-impingement operation and quality components throughout. It features a SIGTac SB15 pistol stabilizing brace, Magpul MOE handguard and grip in flat dark earth, a fixed A2 front sight tower with a Magpul MBUS rear, and a flat-top Picatinny receiver rail with T-markings. U.S.-made 7075-T6 aluminum receivers and clear factory rollmarks round out a clean, well-configured pistol.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This pistol is in great shape with mild signs of wear and use.
What’s Included
- 1x 30-round Magpul PMAG polymer magazine
- Magpul MBUS flip-up rear sight (installed)
- SIGTac SB15 pistol stabilizing brace with strap (installed)
- Magpul MOE carbine-length handguard (installed)
- Magpul polymer pistol grip (installed)
The 11.5 inch barrel is threaded and fitted with an A2 birdcage flash hider, feeding from STANAG/AR-15 magazines with a 30+1 stated capacity. The carbine-length gas system and direct-impingement action deliver the classic AR-15 shooting characteristics in a compact pistol format.
Receivers are 7075-T6 aluminum with a hard-coat anodized finish. Factory markings include the upper rollmark "SIG SAUER SIGM400," the lower rollmark "SIG SAUER INC EXETER NH USA," and a barrel mark of "5.56 NATO." This example is made in the USA.
Sighting and mounting features include a flat-top Picatinny receiver rail with T-markings (T2–T12 visible), a fixed A2 front sight base with sling swivel, and a Magpul MBUS flip-up rear sight. The assembly uses a delta ring with a round handguard cap.
Furniture is Magpul in flat dark earth, including the MOE carbine-length polymer handguard and a Magpul polymer pistol grip. The SIGTac SB15 pistol stabilizing brace includes its strap and molded markings "SIGtac," "MADE IN U.S.A.," and "PATENT PENDING."