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 5895-01-328-9094
NSN 5910-01-127-3482
NSN 5960-01-043-8414
NSN 5915-01-273-3778
NSN 6110-01-276-7141
NSN 5999-00-064-8083
NSN 5975-01-370-5279
NSN 6645-01-250-2702
NSN 5910-01-178-4229
NSN 6610-01-469-8904
NSN 5945-00-006-2821
NSN 6620-00-104-6937