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Archived [ARCHIVED THREAD] - Request Help Deciphering Barrel Markings
Posted: 7/13/2003 9:03:23 AM EDT
I have an AR15 rifle upper with a barrel marked "C MP B".  Using Biggerhammer.net, I believe it's a Colt barrel that has been "magnflux" tested, but I haven't determined what the "B" means.  Can anyone help me out?

Link Posted: 7/13/2003 11:07:49 AM EDT
[#1]
'B' means bore is chrome lined.
Archived [ARCHIVED THREAD] - Request Help Deciphering Barrel Markings
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