Just to clarify, the P308 SBR is going to be one of only 2 of the SR25/M110/DPMS patterned rifles that I have. The rest of mine are Armalite's (shocker by my tag line). I've been kinda going through a short-barrel fixation over the last 2 or so years. But this one will be the only factory built one that I have for the AR platform (thus the pricetag). I've built my other ones. As far as POF. I did a lot of studying before I took the plunge for their version of a SBR 308 AR rifle. It's not just the rails that you're paying for. BIllet upper and lower, NP3 coated bolt carrier w/roller bearing cam pin, short stroke chromed piston system, KNS pins, combat fire control group, 12.5" heavy fluted barrel (you always seem to pay more for less) and other details. All of these things add up even if you try to build a rifle from the ground up.
Nothing is really "cheap" in the 308 AR platform. But there is noticeable differences in quality machining and workmanship from different manufactures. Where some may have issues that pop up from different users....others never get a whiff of a complaint by any of their users.
As with anything in the world of weapons. Personal preference always has a little bit to do with it also.
Not getting defensive. Just pointing out why POF might seem pretty steep in their prices. But, for that matter, other manufactures have their high-end rifles.