BARREL TO FIRE RUBBER BULLETS Russian patent published in 2010 - IPC F41A21/16 

FIELD: weapons and ammunition.

SUBSTANCE: proposed barrel comprises bore limited by diametre D and taper in muzzle part limited by diametre d. In compliance with the first version, barrel bore comprises one spherical ledge directed inward. Distance from said ledge to barrel bore opposite wall equals H. In compliance with second version, barrel bore has two spherical ledges directed inward, the distance from one ledge to opposite bore wall of to opposite ledge being equal to H. Note here that centers of said ledges are located in one plane perpendicular to barrel bore lengthwise axis. Barrel bore shall satisfy the following condition: D/2 ≤ H ≤ d.

EFFECT: no possibility to fire metal bullets.

2 cl, 4 dwg