Ish nailed it. From what I've seen POF makes some great guns, but dimensionally they are quite different. From an engineering standpoint, that heat sink they build into them adds a LOT of weight. Also the railed POF rifles can't be converted to a flattop configuration because there isn't a picatinny rail underneath where the rail system attaches to the top of the upper reciever, just a male dovetail and a couple small notches. And less subjectively, I'm not especially fond of thier FDE colored coating. Whatever material it is, it's very reflective when compared to something like Duracoat or any other finish you usually see on an AR. If I could afford one, I would buy one in black, no doubt, but IMO they're built as much to be flashy as they were to be a solid product.