An item which is an integral part of the barrel extension group of a weapon. It is designed to prevent the loss of gas pressure, by locking the barrel extension to the bolt during firing.
Classification: Parts and accessories for military rifles of heading 9301
NSN 4140-01-520-9714
NSN 2925-01-120-7546
NSN 5905-01-414-5824
NSN 5930-00-175-9694
NSN 5998-01-611-1113
NSN 6150-01-465-7381
NSN 6135-01-265-1384
NSN 6645-01-607-7931
NSN 5999-01-469-9522
NSN 6650-01-326-7305
NSN 5950-01-566-0461
NSN 5920-00-149-1469