After licensing the Auto 5 design from John Browning and producing it as the Model 11 since 1905, Remington redesigned it in the late 1940s. In so doing, they took advantage of mass-production techniques learned during World War II. Introduced in 1948, the 11-48 retained the long-recoil action of the Model 11, but Remington produced it at a lower cost. Not only did the gun make use of stamped parts, but also common parts. It shared several components with the Remington 870 pump, which debuted in 1950. Here’s a fun fact: the 870 12-gauge is built on a 16/20 gauge 11-48 receiver, which is one reason 870s are trim guns.