M4 type barrel only; assembly less handguards, gas tube, delta ring kit andflash suppressor
No other part numbers with same form, fit, and function found.
Classification: Parts and accessories for military rifles of heading 9301
NSN 6620-01-477-3720
NSN 5996-01-455-2198
NSN 6320-00-731-6134
NSN 6220-00-831-8397
NSN 6220-01-347-0041
NSN 6320-00-098-2858
NSN 4140-01-227-4674
NSN 5895-00-834-2110
NSN 6145-00-681-1585
NSN 5910-01-412-7875
NSN 7035-01-166-2473
NSN 4140-00-919-8823