The Desert Tech MDR (Micro Dynamic Rifle) is a family of gas-operated, semi-automatic bullpup battle rifles designed by Desert Tech. Celebrated for its modularity and completely ambidextrous layout, the MDR platform places the firing mechanics behind the trigger to maintain a full-length rifle barrel in a highly compact chassis. VERY GOOD CONDITION NO BOX ONE 30-ROUND MAGAZINE Caliber: 9mm Luger (9x19mm) Capacity: 16+1 rounds (flush-fit) and 23+1 rounds (extended) included from the factory Magazine Compatibility: Fully compatible with standard double-stack M&P9 full-size and compact handgun magazines Action: Blowback-operated semi-automatic Barrel Length: 16.25 inches (Threaded 1/2x28 TPI for suppressors or muzzle brakes) Overall Length: 30.4 inches (Unfolded) / 16.37 inches (Folded) Overall Width: 2.5 inches Weight: 5.03 lbs empty Receiver & Handguard: Durable polymer construction with an integrated, full-length aluminum top Picatinny rail and an M-LOK handguard for accessories Sights: Optics-ready out of the box (Does not include factory iron sights) Stock Compartment: The unique skeletonized buttstock features a built-in storage system that securely holds two spare extended magazines Controls: Ambidextrous slide/bolt release levers, a reversible magazine release, and a cross-bolt safety switch Trigger: Flat-faced M&P M2.0 style trigger with an integrated blade safety, delivering a crisp ~5.0 lb break