I recently bought a Buckmark URX from an INGO member. I first want to say, be honest when selling a gun to someone else. If it has issues, be up front about it. The gun I bought misfires at least once every magazine. The slide is not closing all the way, keeping the firing pin from striking the round. After a successful shot, I have to push the slide forward with my thumb. It looks like the ejector may be causing the interference. I have thoroughly cleaned the gun so contamination is not the issue. Has anyone had similar issues and if so, how did you fix it?