I have been bitten by the SBR AR bug and think I am going to pull the trigger. I was thinking of getting a factory built SBR because for one I hear it is easier to get the stamp and everything (if someone could speak to this it would be great). I have been eyeballing the Daniel Defense MK18 factory SBR. Does anyone have any other recommendations for a Factory SBR? I like the DD MK18 but I am not sure if I want the rail system because of the extra weight and I am a minimalist anyway and do not hang stuff off my rifles. Also I do not want a piston AR. Any input would be great.