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 5915-01-552-8989
NSN 5950-00-249-0888
NSN 2925-00-869-1451
NSN 6105-00-199-8808
NSN 5945-01-333-9386
NSN 6220-01-313-8975
NSN 6320-00-036-3688
NSN 6320-01-261-5983
NSN 6130-01-162-2310
NSN 6105-01-414-8829
NSN 5950-01-047-8069
NSN 5920-00-515-3617