Personally i'd avoid RF based on mixed reviews of their products & CSR.

As for Colt, there's better out there, unless you absolutely have to have a COLT!
http://www.bravocompanyusa.com/BCM-S...m4-16socom.htm

You're $200 less for a Used not the way you want it upper. If you don;t like th ehand guards and going to cut the sight down, just build one the way you want.


Unless you don't have the tools to build your own.