I recently acquired a Surefire forend/light for my 590A1. I had a heck of a time removing the stock forend from the action slide tube assembly. I had to resort to using a hammer to knock it out, and in turn, damaged the threads on the end of the tube and now I can't get the action nut back on. Should a gunsmith be able to re-thread or somehow fix this? A replacement unit runs a little over $70.