Muzzle Brake

Muzzle device for 1/2x28 threads.
I printed it so a tap will fit snugly and cut the appropriate threads to fit an ar15 or 9mm barrel.
Trying to print such fine threads just wasn't going to happen. I have seen similar products made of metal but this was easy enough to do up in plastic. Just run your tap through it and it will fit snugly. 40 mm OD. 70 mm tall. 12 mm hole in bottom to take a 1/2x28 tap.
I drew this up on tinkercad. I am new to 3d design so I start with what I know.