I've been collecting parts for almost a year now...I was looking at the DD quad rails. After shooting a rifle that had one, I really didn't like the way it felt. I did try it with different panels and accessories, but it didn't seem right. After that, I was given a rifle that had a JP Enterprises Hand Guard one it and I really liked it. The way it's clean and easy to grip. The only down side is that you have to buy each bolt on rail piece. I wound up going with a Samson Mfg Evolution 12.5" handguard. It comes with everything needed for install including a few rail sections that can be bolted in at almost any place needed/wanted.