I got the nastiest and loudest muzzle brake (Miculek) I could find at the time I was shopping around for one and was pleasantly surprised at recoil control. Plus I could chased off all the guys that was shooting next to me that had muzzle brakes on their hunting rifles. Ha! Damn Miculek muzzle brake is fricking nuts LOUD!
Yes, the Miculek is obnoxious. The most effective that I own is the SJC Titan. If I were to compete full time, the SJC Titan would be my choice, but it is also one of THE loudest. I also run several Surefire's and they are very offensive also. If it is highly effective, it is going to be a teeth-rattler and ear piercer. I rarely shoot any of these and several are not even mounted on rifles anymore.
How are muzzle brakes for real world use? I haven't seen any military or law enforcement use them except for 50 cal. Wondering if they blast is extreme like when fired in a hallway or in the dark or kicking up dust in the prone.
While the best world would be suppressors, I see devices used quite a bit in LE, depending on policy of course. Work in a team environment with SBR's and devices in shoothouses all the time. Don't really notice it, too focused. Most guys are. Let's not forget that a muzzle device is nowhere near as loud/concussive as a 4-6 or 8-gram, flashbang or a frag grenade in a similar enclosed environment, even if you are on the other side of the threshold. Guys who complain about this, I question their actual experiences, or they have very different ones from me.
Darkness, over-rated topic, unless if it is an absolute flame-thrower or a complete smoke wagon. Dust and debris when prone can be legit. Most of this means you need to pick a sensible hybrid option.