Re: Remington UMC model 51
FWIW, the Savage 1907 and the Remington 51 have something in common - they both had to be designed in such a way as to not infringe existing patents. Even the grip retention had to be done so as not to use screws because the use of screws to hold on the grips of an auto pistol had been patented, as had the idea of a slide and breechblock made as one piece. The inventor who drove other designers crazy? Who else but one John M. Browning?