Nothing earth shattering, but it does reduce noise. - CMMG ZEROED .45 ACP Linear Compensator

Based on Ruger LC Carbine Reviews for accessories, I bought this for my 10mm LC Carbine. I will qualify this by saying that I used a noise meter application on my IPhone and there were some potentially impacting environmental issues (ie. there was a wall on one side of my firing lane, a berm 20 yards in front of my firing position, and I placed my phone 6 feet behind me to keep the mic from blowing out). Anecdotally, it feels like more muzzle blast is directed forward, but my noise meter indicated it was less than 2% quieter with the brake (again, meter behind me). I'll retest in a more controlled environment and edit comments as necessary. You're always going to need hearing protection, but I'm hoping if I fire under pressure, it limits my hearing damage.