An item having a rim, edge or collar for keeping it in place. it is designed specifically to be used on machine guns and the like.
Classification: Parts and accessories for military rifles of heading 9301
NSN 6645-01-432-1068
NSN 5998-01-625-2163
NSN 5950-01-371-3158
NSN 5895-01-544-2607
NSN 5935-01-417-2648
NSN 7035-01-066-5676
NSN 5950-00-164-0442
NSN 6620-00-720-3278
NSN 6650-01-447-2858
NSN 5920-00-294-0753
NSN 6240-01-479-5239
NSN 5930-00-055-9642