Magnum Research MLR (Magnum Light Rimfire) Switchbolt Semi-Auto Rifles are known for their accuracy. Engineered to excel in being lightweight with solid performance, the MLR features a 1-piece, forged 6061-T6, hard-coat anodized receiver with an integral Picatinny optic rail. The custom threaded bull barrel delivers incredible accuracy. The MLR Switchbolt gives you a great trigger and an ambidextrous thumbhole stock. The MLR is essentially a custom rifle at a factory price. Enjoy phenomenal accuracy with the MLR Switchbolt from Magnum Research. Lightweight Ambi thumbhole stock Threaded bull barrel 1-piece receiver with Picatinny top rail Clean trigger pull Hogue overmolded stock