Battle Comp muzzle brake

[kartoffel]

BC 2.0

What's the significance of the longitudinal grooves? Is it just due to a lower tool path between making the gas port cuts, or is that a separate machining operation? If so, why?

On the BC 1.0 the ports break out cleanly to the OD of the comp. On the BC 2.0 they're slightly nestled down into round-bottomed grooves. I'd imagine 2.0 might throw a little more gas fore and aft, rather than radially outwards.

EDIT: Nevermind, I think I answered my own question. See below.

The BC2.0 has the same exterior dimensions as an A2

So the BC2.0 has a slightly larger OD, with the same tool path. Hence the grooves between the gas ports. (But please correct me if I'm wrong!)