Troy, my muzzle brakes are not meant to silence the report on air rifles, but in some cases they do change the sound of the report. Basically I am making them so people cand dress up there air rifles and guns...

I do not put chambers, washers or springs in my muzzle brakes, which would quiet the report considerably depending on how many chambers you have..
And yes I do make muzzle brakes and shrouds for the B-26...:)Materials that I use are, aluminum, delrin and some brass..Depending on what a person designs or wants.
Gene