Patent ID: 9719746
Date: 2017-08-01
CPC Classifications: F41A

Claim:
1. A machine gun assembly comprising: a receiver; a barrel extension mounted to the receiver and configured to move between a forward position and a retracted position with respect to the receiver, the barrel extension being biased towards the forward position and configured for quick-release engagement with a barrel; and an interlock element mounted to the receiver and configured to move between a blocking position and a clear position, the interlock element being biased towards the blocking position, the interlock element having a blocking portion positioned to obstruct movement of the barrel extension to the forward position when the interlock element is in the blocking position and the blocking portion positioned to permit movement of the barrel extension to the forward position when the interlock element is in the clear position, the interlock element configured to move to the blocking position when the barrel disengages from the barrel extension and the interlock element configured to move to the clear position when the barrel engages the barrel extension, the interlock element further including a barrel engaging portion configured to engage the barrel when the barrel is engaged with the barrel extension.