A structure for changing gas cylinder for air guns and paintball guns
including a bottle frame having a lateral through hole on a gun handle, a
prop screwed at the bottom of the bottle frame for moving the gas
cylinder upwardly and downwardly, a valve installed at the top of the
bottle frame and connected to a gas supply valve tube, a track disposed
along both sides of the handle and latched by an embedded member of a
U-shape handle cover. The U-shape handle cover is movable along the track
between open and closed positions. The gas cylinder can be unloaded from
and loaded into the bottle frame without removing the prop or the U-shape
handle cover. The U-shape handle cover can be pushed forward along the
track to completely seal the pressurized gas cylinder to form a handle
without completely removing the prop or the U-shape handle cover.