Higher-spec M400 with a Geissele SSA-E trigger, Magpul furniture, and match-grade barrel for duty and competition use. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 2020, USA Weight: 7.1 oz Overall length: 32.5" Status: Active Intended use: Competition, Duty, Precision, Patrol