Extremely difficult to rack. makes weapon impractical for competition or defense. - OpticsPlanet Exclusive Maxim Defense Industries RDB Roller Delayed Blowback System

I'm so disappointed. I read the reviews and watched the videos saying this was difficult to rack, but thought that how bad could it be, I'll just get a large charging handle to compensate. Wow was I wrong. You have to break your grip and position on the weapon in order to get enough leverage to charge it. No way to do quick changes or stay on target. If you didn't know any better you would think the action was jammed. Sadly the machining and concept is amazing as usual for a Maxim part, but utterly useless. Im packing it up and sending it back.