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 5965-00-549-0220
NSN 5920-01-433-4597
NSN 7035-01-514-4617
NSN 2925-01-629-9416
NSN 6240-01-333-9430
NSN 6220-01-310-8741
NSN 5998-00-510-9157
NSN 5960-00-296-1161
NSN 5960-01-054-8253
NSN 5990-01-113-7238
NSN 5835-01-442-6482
NSN 5990-01-343-6407