| 主权项 |
1. A hushing for the chamber of a sporting pistol or rifle, the bushing comprising a tubular configuration, the bushing comprising a connection passage between a compression chamber and outside the compression chamber, the connection passage having an entrance orifice and an exit orifice, the exit orifice surrounded by a cavity that partially houses a centering element, the connection passage having a first diameter and a narrowed section with a smaller diameter less than the first diameter, said narrowed section consisting of a deformation of the connection passage, the exit orifice, the entrance orifice, or a combination thereof, said narrowed section calibrated to a predetermined value that is a function of the output energy of the sporting pistol or rifle. |
