SIG’s M400 Enhanced rifle is designed for use in law enforcement, military operations, the sporting field, as well as competitive shooting. The SIGM400 is a true AR platform tactical rifle with unparalleled accuracy. A 16″ nitrided barrel provides superior corrosion resistance, and a 7075-T6 aircraft grade aluminum forged lower receiver adds to the durability and reliability that users come to expect from Sig Sauer. This Enhanced Patrol version in 300 Blackout adds a low-profile gas block with an M1913 rail. It features a black hard coat anodized upper and lower receiver, polymer Magpul MOE forend, grip, and a collapsible stock.