Gas-impingement AR-pattern rifle with Barrett's quality benchmarks. Available in 5.56 and .300 BLK; M-LOK handguard. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2016, USA Weight: 96 oz Overall length: 36" Status: Active Intended use: Tactical, Law Enforcement, Sporting