The Rock River Arms LAR-300 is chambered in .300 Blackout, featuring a 16-inch barrel, mid-length gas system, and RRA's two-stage trigger. The .300 Blackout cartridge operates from a standard AR-15 lower and magazine, requiring only a barrel and bolt change from 5.56. RRA's LAR-300 provides the suppressor-optimized .300 BLK cartridge with the premium trigger that distinguishes RRA from budget competitors. Type: Rifle Action: Semi-Automatic Caliber: .300 Blackout Capacity: 30 Year introduced: 2012, USA Weight: 6.4 oz Overall length: 33" Status: Active Intended use: Hunting, Tactical, Sport Shooting