In the last year, I have acquired something like six different pump guns to use and learn about. The list ranges from a Stevens 520 16, to several Model 12s, to now this Model 31. I try to stay in the the pre-WW2 years and my focus is in the lighter versions (16s & 20s) for all the usual reasons (build quality and lighter weight). Each design seems to have strengths and weaknesses and some work better for me than others (I am left handed). None seem to work better for me than a well-fitting double gun, but many come close, and at a fraction of the cost of my doubles. It has been a real pleasure to learn about this period of history in this Country, and see the quality we could produce then.