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 5915-01-097-0955
NSN 6145-01-262-0069
NSN 5965-01-071-3704
NSN 6135-00-945-0015
NSN 6645-01-142-2416
NSN 6610-00-416-9830
NSN 5996-01-264-0291
NSN 5930-00-158-5784
NSN 6150-01-432-1812
NSN 5985-01-590-1415
NSN 6220-01-157-0628
NSN 6220-01-010-3958