I have a DD rail on one of my Colts, and I do like it. However, the new small diameter rail with the user configured rail system that I handled at SHOT is fantastic. It's lighter and less bulky, at least as strong, and modular. I've got a 9mm Colt that needs a forend upgrade, and I'll be going with the new Troy unit.
I'd be a better listener if you stopped talking about stupid crap that doesn't matter.