Law-enforcement-only M400 variant with a 14.5-inch barrel pinned and welded to 16-inch legal length, Cerakote finish, and suppressor-tuned gas. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 2022, USA Weight: 6.9 oz Overall length: 32" Status: Active Intended use: Law Enforcement, Patrol, Suppressed