I received this muzzle device as part of a TacPack subscription. I watched a couple videos about it and decided to throw it on my AR that is set up for shorter distances. It had the standard bird cage A2 flash hider on it before I changed it. I took it to the range today and compared it to my friends AR that has an A2 bird cage. I fired 10 rounds from both rifles, about 15 yards, as fast as I could pull the trigger. The group with the bird cage was spread out, all on target, and roughly within a 12" diameter circle. With the BullMoose muzzle break the grouping was much tighter, most of the rounds were within a couple inches of each other with a few being slightly outside the main group. All the shots would have fell within a 6" diameter circle. I did the same test again, same results. I had a buddy run the same test and basically got the same results except his groups were slightly more spread out than mine. I have not yet had a chance to see how much muzzle flash their is in low light yet. Overall, if your goal is more accurate follow up shots, this device definitely accomplishes that.
Reviewed by: Daniel from MA.