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16" Chrome-Lined Barrel
Dependable Direct-Impingement Gas System
Rotating Locking Bolt
The Sig M400 is a true AR-platform tactical rifle, designed for use in law-enforcement, military operations, or the sporting field, as well as in competitive shooting. The M400 provides unparalleled accuracy with a 16" chrome-lined and phosphate-coated 1 in 7" twist barrel for maximum durability and corrosion resistance. The M400's dependable direct-impingement gas operating system uses a rotating locking bolt. A 7075-T6 aircraft-grade aluminum forged lower receiver adds to the rifle's rugged reliability. This Connecticut, Massachusetts, and New Jersey compliant model features a 10 round magazine, a non-threaded barrel, and a non-collapsible stock.