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 5910-00-817-4639
NSN 6650-01-386-6278
NSN 5975-01-571-9579
NSN 6135-00-009-4100
NSN 6645-01-023-8724
NSN 5910-01-394-5013
NSN 6135-01-343-7093
NSN 6135-01-142-2417
NSN 5999-01-096-1615
NSN 7035-01-181-2705
NSN 5855-00-160-2286
NSN 5960-00-952-1868