Rifle silencer and fixing mechanism

The utility model relates to a fixing mechanism of a rifle silencer, which comprises a muzzle cap and a silencing tube, the muzzle cap is in threaded connection with the silencing tube, and the front end of the muzzle cap is an entrance port; a fixing and locking device is arranged in a cavity at the joint of the muzzle cap and the silencing pipe, the front end of the fixing and locking device is arranged in the muzzle cap, and the rear end of the fixing and locking device is arranged in the silencing pipe; the fixed locking device is provided with a penetrating fixed aperture corresponding to the entrance port, and the size of the fixed aperture is reduced along with the screwing of the muzzle cap and the silencing tube; a gun barrel of the rifle is inserted into the fixing and locking device in the entrance opening, and the fixing caliber of the fixing and locking device is reduced to lock the gun barrel along with screwing of the threads between the muzzle cap and the silencing pipe. According to the silen