Jim Hauff knew more about H&R products than anyone I ever met and back in 2011 he posted this message on another board that may answer your question.Thank you for all the welcome comments. I am glad to join and add where I can.
Thank you for your comments, but does anyone know the answer?
Ok Thank you. I have seen several H&R 939's. Some have UltraSide kick on the side and some do not. I was wondering about the differences