One of my older AR's has an A2 carry handle and I want to put a flat top on. I have an AR "wrench" that I got once upon a time so I could remove the stock off one of them and think it is a tool used for most AR related stuff. It is heavy and has like a half cresent on one end if that helps. So, can I do it? I work real well when I have instructions taking me from point a-z. I'm also wondering if one can buy just a buffer retainer spring and where? I always bugger mine up when removing the stock. Thanks. Rancher FWIW- The rifle is a 93' Colt HBAR.