Well here it goes, I have seemed to of developed an itch for a new SBR. I'm currently planning on doing a PTR PDW in either .308 or 7.62x39, does anyone have an opinion on the better caliber? I'm thinking .308, my cheap side keeps bringing me back to the x39 round for round cost and AK mags. I might even add a can later on down the road, right now I am just being indecisive lol.