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 6620-01-356-2374
NSN 6150-01-053-1291
NSN 5835-00-051-9092
NSN 5930-00-141-1978
NSN 5915-00-549-1098
NSN 5990-01-128-3758
NSN 6130-01-067-6301
NSN 5950-01-165-3757
NSN 6220-00-151-5383
NSN 6150-01-207-0770
NSN 5990-00-232-3965
NSN 5950-01-141-6377