Competition-grade M400 with DH3 flat-faced trigger — SIG's answer to the AR-15 competition market, optic-ready MLOK handguard, and enhanced barrel profile. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2023, USA Weight: 112 oz Overall length: 32" Status: Active Intended use: Competition