A few weeks ago I was talking to my gunsmith friend about this thread and the Model 670. He mentioned that there is, or was, a conversion kit that was available (perhaps through Brownell's or some other supplier) that would upgrade this model to have M70 features. We didn't go into much detail during that discussion as to which features, but the magazine was one of the subjects. Didn't mention the safety. These are basically Model 70's stripped down, and, at least at one point, there were kits to upgrade them available, for the price of some parts and some gunsmithing.