MDR(Micro Dynamic Rifle,微动力步枪)是美国沙漠科技武器公司最新推出的一款无托型半自动步枪,采用活塞导气式自动方式,发射5.56mm NATO弹。该枪上下机匣及护手均采用铝合金材料制成,机匣顶部及护手上方设有一整段皮卡汀尼导轨,其上安装了折叠式机械瞄具和反射式瞄准镜。枪管口部套装了一个与护手形状相吻合的八边形消声器,消声器口部装有涡轮形排气减压装置,消声效果较好。为方便左右手操作,不仅机匣的左右两侧均设有保险和弹匣卡笋,拉机柄和抛壳窗也 MDR (Micro Dynamic Rifle) is a new type of semi-automatic rifle without torpedo released by Desert Technology Arms Corporation of the United States. It uses a piston-driven automatic air-way to launch 5.56mm NATO bombs. The gun up and down the casing and hand guard are made of aluminum alloy material, the top of the casing and hand guard has a whole section of Picatinny rail, which is mounted on a folding mechanical sights and reflective sight. Barrel mouth set a bellows shape consistent with the octagonal muffler, muffler equipped with a turbo-shaped exhaust port pressure reducing device, better sound-absorbing effect. For the convenience of left and right hand operation, not only the left and right casing are provided with insurance and magazine card shoots, pull handle and cast shell window