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 6685-00-175-3008
NSN 4140-01-155-9414
NSN 5960-01-317-3800
NSN 5835-00-711-3371
NSN 4140-01-193-4841
NSN 6110-01-325-4790
NSN 2925-01-104-8163
NSN 6685-00-870-2760
NSN 6685-00-618-6696
NSN 5910-00-644-7300
NSN 5835-01-184-3659
NSN 6620-01-345-4835