AR-15, runs great too. I really don't use it cause I only have 1 ar and its just to mutch of a hasle to put the bolt in just to go shoot a few birds. Then I'd have to clean my gun really good before I could shoot .223 again. If I need a .22 to shoot some pest I just get out the el cheapo single shot, that works good enough for me. Although the cool factor with the AR is there.