"I recieved this item, and tried to get it to fit on my CYMA AK-74U for ages. Literally, days... I finally contacted customer support. They told me that if I was unable to get it to work, they could have me ship it back. Well Trying one last time, I found that you have to screw it on UNBELIEVABLY hard in order to get it to work. So much that I even had to NOT screw in the middle screw, as the metal started to bend. The two other screws are enough to make it fit on, without the metal bending as they are right next to the ends, which act like "support beams." So to answer any questions, this does not simply screw into a screw hole or something. You have to screw the screws in with the L-shaped allen wrench, (I think that's what it is called), and then turn it so you are gripping the long part so you can get a little extra force into it, maybe another full rotation. I was afraid I was going to break the sturdy metal I did it so hard, and VOILA (Or however you say it, just be quiet...) IT WORKED!!!!! All in all I rated it 4 stars because it really comes with no good instructions, and several people giving it reviews have had to take theirs back. THIS WILL FIT YOUR GUN IF IT HAS THE SIDE THINGY, WHICH ALL CYMA OR DBOYS AKs HAVE. you just have to screw it on unbelievably hard. That's about it!"