This thing blew gases everywhere. - Griffin Armament Micro Carry Comp 1/2x28

Shot 300 rounds through it. I did notice a little bit softer recoil and it was fun to shoot. Well, it would have been to shoot if fireballs weren't flying in my face and carbon shooting everywhere. Completely caked my X300 and my Acro in carbon. The gases from this literally blow everywhere. I had a P320 full size, so your mileage may vary with the gun used.

I recommend just getting a single port vertical comp. They may be bigger, but this was a waste. Not sure I can return it after 300 rounds...