SIG's World War Two Semiauto Rifle: The Model U
This video delves into SIG's experimental semiautomatic rifle, the Model U, developed in the 1920s-40s for potential Swiss military and international sales. Out of the 16 units produced in 7.5x55mm Swiss, the Model U featured a gas-tappet operated action with a tilting bolt and an integrated 1.8x optical sight, similar to the K31/42. While a testament to SIG's iterative design process and Swiss manufacturing quality, the Model U never saw military or commercial adoption, representing a valuable historical step in rifle development.














