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 5835-01-384-3206
NSN 6320-01-397-9995
NSN 6110-01-067-7677
NSN 6130-00-752-2584
NSN 5960-00-275-7497
NSN 6240-01-100-1279
NSN 2925-01-552-7151
NSN 5996-00-661-1151
NSN 2925-01-113-6904
NSN 6145-00-170-9415
NSN 5990-00-926-4324
NSN 5930-00-197-5907