Sig Sauer M400 TREAD Pistol – 5.56 NATO, 11.5" Barrel, M-LOK Handguard

The Sig Sauer M400 TREAD Pistol delivers AR-platform performance in a compact, maneuverable package. Chambered in 5.56 NATO, this factory-built pistol features an 11.5-inch barrel, free-floating M-LOK handguard, and SB Tactical adjustable brace for enhanced stability.

Designed for versatility, the M400 TREAD Pistol comes optics-ready with a full-length top rail for easy customization. Its lightweight aluminum frame and durable black anodized finish ensure reliability under demanding conditions. Perfect for range use, tactical training, or personal defense setups, this AR pistol offers the proven quality of Sig Sauer engineering in a compact design.

Whether you’re building out a personal defense firearm or want a reliable AR pistol with room for upgrades, the M400 TREAD is an excellent choice with modern ergonomics and out-of-the-box performance.

Specifications