The Rock River Arms LAR-15 Tactical Operator is a law-enforcement-oriented AR-15 with a 16-inch barrel, fixed CAR stock, quad-rail handguard, and RRA two-stage trigger. Designed for agencies that preferred a non-collapsible stock for consistent cheek weld in patrol rifle qualification. The fixed stock eliminates the possibility of stock adjustment errors under stress while retaining the quad-rail accessory capability. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 2005, USA Weight: 7.2 oz Overall length: 33" Status: Active Intended use: Law Enforcement, Tactical