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Old September 1, 2013, 05:51 PM   #11
Senior Member
Join Date: May 28, 2007
Location: Vancouver, WA
Posts: 268
Already lots of good info here. If you want to research the process look for ferritic nitrocarburizing.

Among others, CMMG LE series rifles use it and so does SIG for the 556 series rifles, instead of chrome lined bores. Lots of other industries use the process, too.
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