The problem is there is not one standard in .308's. In fact DPMS is probably your best choice customizing and slowly becoming the most popular of the variations. DPMS and KAC are based on the original Stoner design. Armalite moved away from that design during the AWB. Many of the parts are compatible, you just need to know which ones arent. Magazines, bolts and barrel nut threads are the big differences. Lets talk about what options you want and work it from there. Tomorrow though as im sick as dog right now and need sleep..