Patent ID: 9057576
Filing Date: 2015-06-16
Classification: F41A

Abstract:
1. A firearm with quick-coupling barrel retaining system comprising: a receiver defining a cavity that receives a reciprocating bolt; a barrel having a bore defining a longitudinal axis and an axial path for a bullet, the barrel having a forward muzzle end and rearward breech end; a barrel extension removably coupled to the rearward breech end of the barrel, the barrel extension including a plurality of barrel locking lugs extending radially outwards from the barrel extension, the barrel extension being rotatable between unlocked and locked positions; the receiver being configured to receive the barrel extension at least partially therein and supporting a plurality of splines configured and arranged to engage the barrel locking lugs; wherein when the barrel extension is inserted into the receiver and rotated into the locked position, the barrel locking lugs engage the splines to prevent axial withdrawal of the barrel extension from the receiver.