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Old June 28, 2021, 07:36 AM   #3
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Join Date: December 13, 2005
Posts: 4,172
My guess would be that whether a muzzle device is finely machined has little bearing on accuracy, but the weight and length would allow a device to act like a tuner, effectively changing the weight and length of the barrel.

I've never found a way to predict how any specific device will influence accuracy other than to try it. I don't have a ton of experience in this, but I've only struck muzzle device gold a couple of times while it must be nearly a dozen times I've seen a degradation in accuracy.

I've a Dez Arms 20" pencil barrel with an old Levang linear comp that is amongst my most accurate centerfire ARs. For rimfire, I did once find a brake that both detectably reduced recoil and tightened groups a bit, but the reliable answer for those is a plain thread protector.
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