Stay away from the UTAS, it's a turd. I already have along list of parts that have broken on it. Warranty is only good for a year. I am waiting on a shipment of parts to get it back together. It sounds like an awesome idea, just was not well planned by the designer. I know there is the one guy who swears by it, but he is one of the few. I am making a few changes to see if it will help. I also purchased a Vepr and it flat out runs for the same price. Dissident has them in stock form. Went to their shop yesterday to get some mags and parts. It's actually cheaper than the xtr and way better.