This is a used Sig Sauer M400 Tread 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. Includes factory box. Overall, this Sig is in very good condition with minimal wear. This would be a great choice for home defense. Buy online today!