Standard Manufacturing Jackhammer SD Features The Standard Manufacturing Jackhammer SD runs on a semi-automatic blowback action that cycles rimfire .22 LR ammunition reliably giving shooters a fast-cycling plinker built for high-volume range days. The threaded 1/2x28 muzzle allows for a suppressor or muzzle device adding versatility for shooters who want a quieter range experience. A top-mounted Picatinny rail runs the length of the receiver giving shooters a stable repeatable platform for mounting a red dot or magnifying optic. The ambidextrous safety means left and right-handed shooters alike get the same fast intuitive manual of arms without compromise. Machined from aircraft-grade 7075 aluminum the Jackhammer SD s frame is both lightweight and durable keeping the overall package easy to handle for extended shooting sessions. A polymer stock with M-LOK slots runs along both sides of the receiver letting shooters attach lights grips or other accessories to suit their setup. The pistol ships with one magazine and can run either the included 10-round stick magazine or the massive 50-round drum giving shooters a huge edge in plinking and training scenarios where reloads slow things down. For shooters who want an aluminum-framed rimfire pistol built for fun capacity and easy optic mounting the Jackhammer SD delivers a genuinely different shooting experience. Standard Manufacturing Jackhammer SD Specifications Brand: Standard Manufacturing Model: Jackhammer SD Type: Semi-Automatic Pistol Caliber: 22 LR Barrel Length: 5.375 Capacity: 10-Round Stick / 50-Round Drum Action: Semi-Auto Blowback Frame Material: Aircraft Grade 7075 Aluminum Grip Material: Polymer Sights/Optics: Picatinny Rail Muzzle Thread: 1/2x28 Handguard: M-LOK Weight: 2.5 oz Available At: GrabAGun