This is a used Sig Sauer M400 Tread AR-15 rifle chambered in 5.56 NATO. It features a 16-inch barrel with a 1/8 twist, 30-round magazine, picatinny optic rail, free float MLOK handguard, and Magpul SL-K stock. Overall, this Sig is in good condition with normal wear on the receiver and handguard. Bore condition is good with crisp rifling. This would be a good choice for home defense. Buy online today!