Absolutely the best brake on the market - ArmaLite M15 3-Gun Muzzle Brake w/ Tuning Screws

I own ten different brakes, you name it I own it. I found only two that really keep muzzle from moving. I took slomo videos and the front of the rifle against the background does not move at all, like shooting a 22 lr. I only wish they added one more chamber (4 cuts instead of 3, I know there is another hidden chamber where the set screws are but one more would be great) and also made the dia. just a tiny bit bigger/fatter (more surface area for gases to hit). The only other brake that works as good is a 29.00 Chinese cheapo but it works as it has 4 chambers and is bigger in over all dia. the set screws that come with the Armalite are great, you can drill holes in center of these (they have pre drilled starter holes, work great for those who have muzzle flip to side or up. I only has to drill a small hole in top set screw the size of the starter hole they put in it for centering. this brakes works !!! no BS. I thought that it was expensive at first but its worth every penny and I will no other . except the ones on my guns that have "Cans"