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 5920-00-160-5208
NSN 5910-00-199-7662
NSN 6135-00-548-2765
NSN 5996-01-537-1999
NSN 6145-00-033-2997
NSN 6150-01-519-2401
NSN 6105-01-317-0342
NSN 5975-01-641-5306
NSN 5998-00-225-8522
NSN 5905-01-376-7564
NSN 6240-01-494-3695
NSN 5915-01-452-2735