I actually prefer the A1 stock. It is a little shorter, which is more comfortable for me than the A2 that came on my Bushmaster. It also has the storage space. I put the A2 butt plate-trap door on it, in fact I used all the hardware from the A2, Except the one screw that is a different length (I forget if was the top or bottom). They don't make them any more, and I think they are made of an older form of plastic. There has been talk of a couple of companies making them out of the A2 plastic, but I haven't seen them yet. The company that makes the C-7 for the Canadian armed forces makes them, but won't/can't sell to civillians. I got mine from Landry's (don't remember the phone #, had to call a bunch of times, but when I finally got a live person everything went fast and smooth.