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 5935-01-095-3459
NSN 5990-01-529-8433
NSN 5855-01-165-2177
NSN 5990-01-116-2181
NSN 6620-01-485-6459
NSN 5855-01-132-5139
NSN 5910-01-251-5575
NSN 2925-01-502-9903
NSN 5999-01-269-9384
NSN 5910-01-197-0470
NSN 6320-01-556-2011
NSN 4140-00-977-6297