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 5965-01-593-6478
NSN 6145-00-791-9820
NSN 5998-01-020-7848
NSN 2925-00-084-8462
NSN 7035-00-890-7649
NSN 5998-00-958-7399
NSN 5930-01-480-9591
NSN 6135-01-196-2135
NSN 5925-00-715-2001
NSN 6240-01-026-1376
NSN 5998-00-740-7515
NSN 5905-00-523-8458