Rock River Arms LAR-15M Features The Rock River Arms LAR-15M is built around a forged LAR-15M lower receiver paired with a purpose made billet A4 upper giving the rifle the familiar AR-15 manual of arms in a dedicated .17 HMR rimfire platform. The 18 inch chrome moly barrel carries a 1:9 twist rate tuned for the .17 HMR cartridge delivering the accuracy needed for small game and varmint hunting at extended range. A low profile gas block and A2 flash hider at the 1/2x28 threaded muzzle keep the front end light while controlling muzzle flash. The RRA two stage Ultra Match trigger backed by the RRA Winter Trigger Guard gives shooters a crisp consistent break that makes the most of the rifle s inherent accuracy. A 15 inch RRA free float M-LOK handguard provides a stable mounting platform for lights lasers or a bipod while keeping the barrel unstressed for better accuracy. The Magpul MOE SL-K buttstock and MOE pistol grip both finished in black give the rifle a familiar adjustable ergonomic package that shooters can dial in to their preferred length of pull. A Picatinny rail atop the receiver provides a mounting surface for the optic of the shooter s choice since the rifle ships with no iron sights installed. At 6.75 pounds and 33.5 inches overall with a 10 round magazine and hard case included the Rock River Arms LAR-15M is a complete ready to shoot rimfire package for sale at GrabAGun. Rock River Arms LAR-15M Specifications Manufacturer: Rock River Arms Model: LAR-15M Caliber: .17 HMR Capacity: 10+1 Barrel Length: 18 Barrel Material: Chrome Moly Steel Barrel Finish: Black Nitride Twist Rate: 1:9 Muzzle: A2 Flash Hider Thread Pattern: 1/2x28 Trigger: Two Stage Match Handguard: 15 M-LOK Free Float Stock: Magpul SL-K Grip: Black Magpul Receiver: Picatinny Rail Overall Length: 33.5 Weight: 6.75 lbs Includes: Magazine Case Available At: GrabAGun