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Re-"vetting" an AR after modifications?
When changing a major component on an AR that has been proven as sufficiently reliable for defensive use, such as, the BCG, FCG, lower receiver, or in my case, going from a Carbine H-buffer and 6-Position receiver extension to a Rifle buffer and receiver extension, approximately how many rounds should you put through the gun in its new configuration before judging it re-"vetted" for defensive use?
Do you treat it like a new gun and start the count over again, or is a more cursory test of function good enough when your starting point is a gun that has a history of functioning well?
In my particular case, the Carbine upper in question has actually been on a lower with a Rifle buffer and receiver extension once before a couple years back, and aside from some issues with PMC bronze, was reliable in that configuration. I'm simply going back to that setup because I find I like the way Carbine and Midlength ARs handle and shoot with a fixed A1 length stock.
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If I change anything on any of my rifles, I consider them GTG after completing a coarse of fire with no malfunctions, using my "SHTF" load out with the mags and ammo I intend to use in such a scenario.
That may be overly an simplistic approach, but it's just how I do it.
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There is no magic number. Shoot till you feel comfortable with it.
Few hundred rounds trouble free would be good for me personally.
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Depends on the change.
If I replace the action spring or extractor spring with the same brand and type, then a mag or two is acceptable.
Combining a new brand of mag with a different action spring and buffer equals treating it like a new gun.
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