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 5905-01-530-6326
NSN 6620-01-236-4656
NSN 6685-00-829-2797
NSN 5905-01-428-8908
NSN 5990-01-235-8404
NSN 5920-01-270-0615
NSN 5920-01-577-9712
NSN 5998-00-694-0019
NSN 6220-01-573-6204
NSN 6645-01-477-9292
NSN 5960-01-564-5044
NSN 6650-01-497-5782