Questions about some parts (Muzzle, buffer)

[Klem]

But in the end, whatever you have on the end you will likely have a lot of success by tuning your loads for the given set up, correct?
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That tuner sure does look goofy doesn't it. The tuner I saw in action cost the owner (not me) a lot of effort and rounds downrange to get to the point that he didn't think he could make it work. It was a brass weight on a thread held in place by an Allen key set screw. He screwed it in and out over a period of time hoping to achieve the sweet spot. An interesting experiment for a heavy precision bolt gun, but probably not for an AR.

Agreed, if you accept the utility of your muzzle device is worth more than how it affects barrel whip then you can make peace with that. And the effect may be good or bad and probably almost negligible.