Mauser M-15 Features The Blue Line Solutions/Mauser M-15 22LR rimfire carbine features a 3-position synthetic side folding stock and folding front/rear sights. Each rifle ships with one 22 round magazine. Mauser M-15 Specifications Model Series: Mauser M-15 Caliber: 22 LR Capacity: 22+1 Barrel Length: 16.53 in. Minimum/Overall Length: 34.65 in. Safety: Manual Safety Chamber Length: 0 in. Frame Finish: Flat Dark Earth Front Sight: Folding Rear Sight: Folding Grips: Pistol Features: Made In Germany Finish: Flat Dark Earth Magazine Type: Single Stack Magazine Barrel Configuration: Single Barrel Twist: 1-16 Threaded Barrel: Yes Rifled Barrel: Yes Forend Rail: Picatinny Minimum Pull Length: 0 in.