This video explores a rare Winchester prototype .410 bore pump-action shotgun from the 1920s, discovered at Rock Island Auction Company by Brownells Gun Techs. The prototype is a precursor to the renowned Winchester Model 42, showcasing early design work on balance, weight, and operation. Notably, it features a solid-frame receiver originally intended for a .38 caliber rifle and exhibits typical toolroom craftsmanship with no markings, braised triggerguard, and unblued metal. The design is described as clean, streamlined, and elegantly simple, with a humped-back receiver reminiscent of Browning designs, though John Moses Browning's direct involvement is unconfirmed. This unique piece offers a glimpse into the development process of a classic firearm.
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