I finally bit the bullet and broke down and bought a quad rail. I said I never wanted one, but I got it pretty cheap ($60). It is a CMMG. (At least I think that is what it is. I threw away the package and don't remember for sure!) Works pretty good, don't have to take anything apart to put it on, and it seems very solid. A friend I work with has one and told me he thought it was every bit as good as one he had that he paid $200 for. I don't know what is wrong with me. Next thing you know I will want a forward grip!