Pro-grade MMR with an 18-inch stainless steel barrel, a full-length free-float M-LOK handguard, and a Timney two-stage trigger. Aimed at precision shooters and competition AR users who want a factory-ready precision package. Type: Semi-Auto Rifle Action: Gas-Operated Caliber: 5.56x45mm Capacity: 30 Year introduced: 2013, USA Weight: 7.3 oz Overall length: 38.5" Status: Active Intended use: Competition, Long Range, Range