I think it would of had the M stamped on the frame above the model number if it was done. Welcome to the forum a great place to hang out. I dont think you have to have the recall fixed but you can have it done for free. If it is a range gun only I would just leave it alone. if it is for personal defense it might be a good idea. Others will have more information on it Im sure. I have a 586 without it and will leave it alone. Hope this helps, Theo

Oh and we like pictures