This happened to me before, during, or after I got my gun back from Tripp Research. Slide wasn't going all the way into battery, and it actually locked and I could not rack it at all. I sent it back to Tripp's Armory, replaced the defective roll pin. They were not sure if they did it or not, but they fixed it no prob.macarthurite said:Well my XD 9 broke on me today,butI found the problem, the roll pin that hols the firing pin broke. Is it just a standard 1/8 roll pin or is it special?