Couple cheap fixes. Move scope forward. Most people mount them to far back. Your nose should almost be touching charging handle. Squeeze lever and extend stock all the way out. (Couldn't resist being a smart a$$) I have seen people that didn't know they were moveable). Get a cheap slip on brown pad from walmart and add paper between it and butt plate to find the length you want. Mako, tapco, and few others make risers for AR's but I bet you won't like running a charging handle with one.