| 摘要 |
A training cartridge ( 5 ) and gun barrel insert ( 1 ) assembly, wherein: a) the training cartridge ( 5 ) comprises a sleeve ( 17 ) shaped and configured to fit the breech of a gun and which holds a primer ( 21 ) and bullet ( 20 ) assembly; the assembly being located at the rear portion of the cartridge ( 5 ); a channel ( 22 ) extending forward from the bullet ( 20 ) and a recessed front channel portion ( 4 ) for receiving the sub-calibre barrel portion ( 3 ) of a corresponding gun barrel insert ( 1 ); and b) the corresponding gun barrel insert ( 1 ) comprises a sleeve ( 2 ) shaped and configured to fit at least in part into the barrel ( 10 ) of a gun; the sleeve ( 2 ) being located around a sub-calibre barrel ( 3 ); wherein the sub-calibre barrel ( 3 ) extends rearward beyond the sleeve ( 2 ) in order to project into the recessed front channel portion ( 4 ) of the corresponding training cartridge ( 5 ) .
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