Before the demise of Remington and all of their companies, DPMS had come out with a gen 2 receiver that was according to DPMS much lighter and used more AR15 parts that the standard DPMS version of the AR10 rifle. Is any manufacturer still making this version? Exactly what is the difference and does it really reduce weight as claimed, is there enough of a weight reduction to make it worth while to try and build at this point? If i recall correctly PSA bought the DPMS brand, have they done anything to start making DPMS rifles again, do they plan to??