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 5960-01-413-3877
NSN 5835-01-065-3316
NSN 5945-00-269-5375
NSN 6110-01-544-6383
NSN 5930-00-960-7223
NSN 6650-01-532-6966
NSN 5960-01-429-5897
NSN 5996-00-013-7996
NSN 5960-00-435-1967
NSN 5835-01-550-5094
NSN 5975-00-532-5870
NSN 5960-01-544-1273