I was at the range yesterday and a guy had one of the new bushmaster acr's that he had just picked up. I got to burn a clip through it and loved it!. he was using open sights and just messing around with cheap ammo so accuracy wasn't a big issue to him. I was just wondering if anyone had a chance to use it yet? I was wanting a sig 556 but the acr seemed so light and i love the slide release on them!! any input??