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 5990-00-780-7843
NSN 5835-01-281-7281
NSN 5895-00-493-3114
NSN 5935-01-424-0575
NSN 6150-00-050-0910
NSN 6650-01-078-3184
NSN 5999-01-597-2854
NSN 6130-01-535-0952
NSN 2925-00-911-4872
NSN 5915-00-884-2184
NSN 5935-01-290-5817
NSN 5895-01-606-3428