The Bergara BXR BXR001 .22 LR Semiautomatic Rimfire Rifle is constructed with a 4140 CrMo fluted steel barrel that sports a matte blued finish and 0.5x28 muzzle threading. The is integrated with a 30 MOA picatinny rail as well as QD flush cup sling and swivel mounts. Bergara BXR BXR001 .22 LR Semiautomatic Rimfire Rifle - Rifles Rimfire at Academy Sports