16-inch standard-barrel Monolithic Rail Platform with LMT's iconic single-piece upper. Baseline MRP configuration with rifle-length handguard. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2003, USA Weight: 128 oz Overall length: 34" Status: Active Intended use: Tactical, Law Enforcement, Sport Shooting