A cartridge dispensing gun

摘要

A manually operably cartridge dispensing gun (1) for cartridges of the kind containing two components. The gun includes a bed (2) to captively retain the cartridge and a manually operable drive assembly to advance inner (4) and outer (5) concentrically arrranged piston pushers against corresponding pistons in the cartridge. The outer piston pusher (5) is dimensioned to bear against a circumferentially outermost piston in the cartridge and includes a central aperture to accomodate the inner piston pusher (4) of a first dimension for use with an inner piston of a cartridge having a first component ratio. The inner piston pusher (4) is selectively reconfigurable to a second, reduced, dimension for use with an inner piston of a cartridge having a second component ratio.