I've aquired a DPMS orical with a stainless barrel. since buying it Ive looked on the internet and it seems that the different AR websites bash the DPMS Brand. Ive not shot the gun yet can someone enlighten me on the brand. I also have a chance to trade my upper for a rock river upper of the same design as the orical. It will cost me 100.00 to trade Im wondering if this is something I should do.