Paying $300 for a quad rail and then buying special tools to be able to change it seems crazy to me. Has anyone had DPMS install the one they sell (About $189??)? Who makes it? I’m wondering how much additional they would charge if I just send them my 308 AP4 upper and had them change it. I’m thinking I could sell my rifle and buy a new one with the rail for less than this project will cost. (If I could find a new one with the quad of course.)