I've been researching the AR-15 platform for purchase for a few months now. After extensive searching I think I have decide on a rifle, but I would like to first hear your opinions on it. The AR I have in my sights is a Lewis Machine &Tool CQB MRP Defender Model Piston 16. I really like the idea of a monolithic rail platform. The piston feature is also a huge selling point for me. Does anyone have any thoughts, or better yet, hand on experience with LMT?