I have a RRA ar15, and I just purchased an accu-wedge for it tonight. I'm doing exactly what the instructions say to do, but there isn't a chance in hell of squeezing the upper and lower together to push the pin through. i still have probably 1/8" that remains and I cannot get it to close further. I've tried clamps and it still won't close further. Any suggestions? Is it possible that it's just too thick and won't work regardless? maybe shaving a little bit off the bottom is the solution. Anyways if you have any solutions I'd be glad to hear them, as I'm frustrated with trying to get it in.