You need to trust me on this one. I work with a lot of guys who have AR15 with quad-rails on them. Some of them have spent the $350 for a surefire quad rail and others have other brands. I purchased a UTG brand from cheaperthandirt.com It is as good of quality as the surefire for a fraction of the price at $60! I mean heck your buying a chunk of metal, I don't understand why such a difference in price. Maybe theirs is a few oz less in weight or something. If you get it you will not be disappointed. Look at all the positive reviews while your at it. Thats one nice thing I like about cheaperthandirt http://www.cheaperthandirt.com/ARR138-7.html
I tried the CAA polymer one. And well.....that didnt work out to well. There was to much flex, and the fit wasnt that good. I will be sending that one back to Cabelas. Yes, that UTG does look like a pretty good deal...