Locked machine gun

The invention relates to a locked machine gun - A housing (5), - A barrel (1), - A lockable shutter (27, 29) with at least one locking body (23, 25), - An abutment (13, 15, 17, 21) for receiving the locking or the body (ies) (23, 25) of the locked closure and - A quick change device (3) for removal of the barrel (1) and attaching a new barrel (1), so the barrel exchange. This known machine gun is for the purpose of ease of manufacture and / or reduction of wear is further developed in that - A first portion (15) of the abutment (13, 15, 17, 21) when exchanging the housing (5) remains, - A second part (17) of the abutment (13, 15, 17, 21) with the barrel (1) and - The quick-change device (3) is adapted to a separation between the the housing (5) remaining first part (15) of the abutment (13, 15, 17, 21) and the barrel (1) with the second part (21) cause.