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 4140-01-400-3610
NSN 5915-01-435-7893
NSN 6105-01-052-1672
NSN 5975-01-020-7869
NSN 6110-00-216-6911
NSN 5999-01-528-7492
NSN 5935-01-054-6983
NSN 5996-01-449-0666
NSN 5920-01-599-4432
NSN 5945-01-130-8303
NSN 5835-01-108-4980
NSN 5895-01-543-7360