Call S&W. Their warranty service is great. I have a SW40VE that has been nothing but boring. I've never had a problem in 600-700 rnds. I also have a 3913NL that I bought from a SCDNR officer that was pre-owned before him. It was shooting low and I call S&W. The service representative told me ship the gun back and they would repair it. They replaced the front sight and checked the gun out for any other problems. My cost for the repair was not one penny.They even paid shipping both ways. The pistol now shoots to poa and is the most accurate handgun I have.