该枪由重庆长风机器公司研制,采用枪管短后坐-半自由枪机式混合自动方式,枪弹击发后,枪管、套筒一起后坐一定距离,而后枪管被阻挡停止后坐,套筒则在惯性作用下继续后坐。其枪管外侧加工有螺旋槽,套筒后坐时便于枪管旋转,消耗一部分后坐能量,有利于降低后坐力,同时也延迟了套筒后坐,防止炸壳。该 The gun by the Chongqing Changfeng Machinery Company developed a short barrel with a barrel - a semi-free automatic gun-type hybrid mode, after the firing of the barrel, barrel, sleeve sit back a certain distance, and then stopped after the barrel to sit, the sleeve is Continue to sit after inertia. The outer side of the barrel is machined with a spiral groove, the barrel is easy to rotate when the recoil seat consumes part of the recoil energy, which will help to reduce the recoil force, but also delay the recoil of the sleeve to prevent the shell. This