I use this on my KWA M4A1 and it looks amazing. Although it takes some practice to attach it, once you practice enough it's very easy.
The only problem was that the attach points are supposed to go parallel with the ground but it was a bit loose still even with the hex screw in. I had to twist it so they are at an angle which causes the lettering to be on the bottom side of the silencer. Not that big a deal for me though.
HEAVY. It has caused my gun to be very front heavy but I like the feel. It feels more real and causes no flex on my gun.
Attaching and detaching takes practice
Even with these cons, I refuse to take a star away.
Rating: [5 of 5 Stars!]