Barrel hardness, brinell 277 to 331
No other part numbers with same form, fit, and function found.
Classification: Parts and accessories for military rifles of heading 9301
NSN 4140-00-283-6843
NSN 5998-01-502-6954
NSN 6105-01-239-9099
NSN 5990-01-293-4817
NSN 5965-00-463-3929
NSN 6110-00-734-4692
NSN 5915-01-489-6185
NSN 5998-01-506-2716
NSN 5998-01-159-6892
NSN 6320-00-070-4544
NSN 5920-01-535-6498
NSN 5910-00-782-5051