1/2x28 9mm muzzle device

[U&A]

The potential effectiveness of any brake depends on the weight of powder gasses available to redirect.

4 grains of pistol powder doesn't give you a lot to work with.

Hit the nail on the head.

[TaterTot]

The potential effectiveness of any brake depends on the weight of powder gasses available to redirect.

4 grains of pistol powder doesn't give you a lot to work with.

But what about tacticoolness?!? I saw a crown looking md today at a gun shop with pointy spikes on it. Serious tacticoolness and vented like an A1 it would help with flash. Wide open for unimpeded 9mm passage too. OP go with whatever you think looks good, there's not enough gas volume on a 16in PCC for any real breaking effect.

ETA if whatever you like doesn't have clearance for 9mm run a well lubed 3/8 drill bit through the bore at low speed. As long as you take it slow and let it self center you should be good for clearance

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[Bushy24]

Makes sense. I'll be shooting soft reloads, Winchester USA white box and hot reloads.