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 5895-00-157-1332
NSN 5915-01-353-7822
NSN 2925-01-471-4912
NSN 6610-01-415-1623
NSN 5950-00-228-0818
NSN 6145-01-350-4677
NSN 6150-01-359-5944
NSN 6685-00-473-2423
NSN 6650-00-267-0390
NSN 5999-01-487-6700
NSN 5895-01-507-3526
NSN 6145-01-218-6029