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 5999-00-548-7722
NSN 5996-00-011-5651
NSN 5930-01-236-8368
NSN 5990-01-083-7581
NSN 5930-01-121-6526
NSN 5945-01-502-9531
NSN 5915-00-353-0853
NSN 6685-00-125-4472
NSN 5930-01-212-4331
NSN 6645-00-103-2517
NSN 6150-01-483-1857
NSN 6240-00-827-0889