Are all Bushmaster 14.5" M4 bbls Chrome?

[Seattle206]

I was browsing their website it shows all their 14.5" M4 barrels feature 1x9 Chrome-lined barrels. I emailed them a week ago and have not received an answer. Any help here? Thanks.

edit:

the barrel reads: B MP 5.56 NATO 1/9

if memory serves me right, the "B" stands for "chrome bore", Is this correct?

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[deadeye]

as far as I know all their barells are chrome lined and 1in9

 

[Seattle206]

ok thanks, i was at the local gun show and saw a few bushmaster 14.5" m4 uppers marked with b mp 5.556 nato 1/9 and the dealer said they werent chrome lined. maybe he didnt know that they were.

 

[The B]

one way you can verify that a barrel is chrome-lined is to simply look at the chamber.. if you see a ring of light gray surrounded by darker gray or black, that's chroming extending out of the chamber.

just because you dont see chrome there doesn't mean it's not chromed, however- some manufacturers chrome their bores, but not their chambers.

View attachment 227637

 

[Seattle206]

thanks for the picture! good reference.