Premium M400 with Geissele trigger, Sig keymod/MLOK handguard, and enhanced bolt carrier group. Sig's top-end conventional AR-15. Type: Carbine Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2019, USA Weight: 112 oz Overall length: 32" Status: Active Intended use: Precision Shooting, Competition, Sport Shooting