Lacquer bullet gun Gas entry valve

A lacquer bullet gun gas entry valve, used in conjunction with a lacquer bullet gun having a firing device and placed inside said lacquer bullet gun at an entrance of a conduit between an expansion chamber and a bullet chamber, said lacquer bullet gun gas entry valve comprising:

• a valve body, located in said expansion chamber, having a longitudinal axis defining a longitudinal direction, with a passageway running along said longitudinal axis, which has a lateral opening, allowing compressed gas, having entered said passageway, to escape to said bullet chamber;
• and
• a shutter, tightly closing a front end of said valve body, having a first surface to which a first rod is attached, said first rod longitudinally passing through said passageway and having a far end which extends beyond a rear end of said valve body, so that pushing of said far end by said firing device causes said shutter to be opened, with several longitudinal grooves cut into said far end of said first rod, providing a path for compressed gas to push back said firing device, said shutter furthermore having a second surface opposite to said first surface to which a second rod is attached which is aligned with said first rod on said longitudinal axis, wherein, after reversing said first and second rods, said second rod is inserted in said valve body to be pushed by said firing device for opening said shutter, with several longitudinal grooves cut into a far end of said second rod, said longitudinal grooves of said first rod and said longitudinal grooves of said second rod having different total cross-sections, permitting different quantities of gas to flow through.