The SM-1 Service Match was Olympic Arms' competition AR built to CMP/NRA service rifle rules — A2 upper with carry handle, 20-inch chrome-lined barrel, two-stage National Match trigger, and a free-float handguard configured to appear non-free-float from the outside. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 1995, United States Weight: 112 oz Overall length: 39.5" Status: Discontinued Intended use: Competition, Target Shooting