12.5" Melonite barrel - Handguns and Ammunition Forums
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Old 04-09-2018, 04:19 AM   #1
Join Date: Mar 2018
Posts: 14
12.5" Melonite barrel

I'm a fairly new member here. I did some searching but couldn't find an answer. I just bought a 12.5 government profile 5.56mm barrel. It's QPQ treated, which I believe is the same as Melonite. The bore is significantly lighter in color than the barrel extension and outside of the barrel. Is that normal for a QPQ barrel? I assumed the treatment process turned the metal black. I only have experience with chrome lined barrels, so I don't have anything to compare it to. Thanks
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Old 04-20-2018, 04:31 PM   #2
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Join Date: Feb 2010
Posts: 1,668
Was this barrel fired after the treatment? Parts of different alloys or hardness will not color precisely alike. If one part and the bore has a different color; I suspect firing.
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