I have had a new Rail Gun and a new Combat Commander the last couple of years. I thought the slide stop was welded in both of them. Trouble getting them out and trouble getting them back in. The Rail gun eased up fairly quickly but after six months and a thousand or so rounds the CC is still very difficult to get back in. Liberally oiling the dent tunnel helped a great deal. I still, sometimes, have to use half of a wooden clothespin and a small brass hammer to help it out. And it usually takes at least a couple of tries to get it back in.