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 6645-01-510-3496
NSN 6320-01-098-2503
NSN 6110-00-408-2465
NSN 5855-01-362-7066
NSN 6145-01-188-5856
NSN 2925-01-244-3016
NSN 5935-00-275-7862
NSN 5915-00-132-3493
NSN 5925-01-535-1318
NSN 6135-01-196-7399
NSN 6220-01-259-2430
NSN 5920-00-340-3002