I have a Remington R25 receiver set and I am wanting to build it into an operational riffle. The main thing im stuck on is what i need for the upper. From what i have read, it is a dpms lr308 gen 2 style rifle and I am seeing contradicting information on the barrel, bcg, and dust cover. Is it possible that i could use an lr308 barrel with lr308 bcg in this receiver? I can tell a regular dust cover wouldnt work due to the cutout on the receiver. Any help on this is greatly appreciated.