Does anyone have any experience with these rifles? I really like the concept and I am thinking of buying the LR300 upper. It seems to give all the benefits of DI without the dump of carbon in the upper. Before anyone starts the piston vs. DI let me say, I am NOT on the piston AR bandwagon. If you like it that is fine but don't start a debate. I want to know what users like and dislike about the D.I.G.S. system. Even if you are not a user what are your thoughts on it.