Incredible recoil reduction - Precision Armament M4-72 Severe-Duty Compensator

I purchased this brake based on the review and comparison that was done on thetruthaboutguns.com It does exactly as intended and cuts recoil down to almost zero. I initially put it on my Kel-Tec RDB but the blast from having the muzzle so close to you while in an indoor range was too much. Outdoors would likely be fine but indoors is too much so I moved it to an AR platform and absolutely love it.