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 5985-01-153-2657
NSN 5945-01-430-8751
NSN 5999-01-234-3983
NSN 5990-01-255-6860
NSN 6110-00-084-5371
NSN 5998-01-471-0389
NSN 5895-00-720-4148
NSN 2925-00-416-2894
NSN 6240-00-123-7648
NSN 6645-01-614-4838
NSN 6610-01-560-9461
NSN 6650-01-060-3628