I'll have to look it up. I'm using a cheap Midway break. The Ar don't have that big of recoil, but after watching the youtube vid on the BH Rolling Thunder, I gotta have one. It would be nice to have little movement when zeroing or using my red dot.
You think the AR in 223 has no recoil until you put a brake on it and it and then you realize that it has more than you thought. It cuts it an amazing amount. I only bought it because I was curious. Too much noise for hunting and I have a 223 can now so I havent seen it in a few years. I want to see what it does on my 22/45 and if I decide I dont want it on there I may throw it on the pass it down thread or give it to you if you want it.