Patent ID: 8087194
Filing Date: 2012-01-03
Classification: F41A,Y10T

Abstract:
1. A barrel retaining system for a firearm 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; a barrel extension coupled to 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; and a barrel nut attached to the receiver and being configured to receive the barrel extension at least partially therein, the barrel nut including a plurality of internal splines configured to engage the barrel locking lugs, wherein the splines further engage a flange formed on the barrel extension to further secure the barrel to the firearm; wherein when the barrel extension is inserted into the barrel nut and rotated into the locked position, the barrel locking lugs engage the splines to secure the barrel to the firearm; and further comprising camming notches disposed on the barrel extension and configured to slidably engage a rear end of each spline, the camming notches axially displacing the barrel extension rearward in relation to the barrel nut upon rotation of barrel extension to compress the splines between the flange and barrel locking lugs.