Read before buy - Airborne Arms AAS8 Spectre Muzzle Brake

I recently ordered the airborne arms muzzle brake for my AR15 300 BLK in March 2021. The barrel is a 16” Wilson Combat threaded 5/8”x24. I did not need modifications done to have installed. I brought it to my local gun shop that is very reputable to have installed professionally. The same day the gunsmith called me telling me there was a problem with the brake but he had it installed. I arrived and the brake had small scoring, scratches, from where the wrench made contact. In my opinion, I do not think a steel brake should ever scratch with hand tools and strength. The brake also has too small of edges for a wrench to tighten properly. If I were you I would not attempt yourself and explain this to the professional gunsmith before he installs for your firearm. The good: The airborne arms muzzle came with many shims for installation. I put only 200 rounds through it over last two weeks because ammo prices are awful and I could tell a reduction in recoil but this brake is strictly, in my opinion, for looks. I think it will do fine on my AR but if you are looking for real performance I would look at different brands.