Watching this video, I have a whole new appreciation of the manufacturing technologies of today. Modern CNC machines have a massive advantage over the CNC machines of old. Still, amazing things were possible using analog machines with the right set-ups and processes.
Remington of old had this down to a “T”. The video showcases the massive amount of tooling and machinery needed to make even a Model 1100 shotgun during its heyday. While I have not had the pleasure of seeing the factory recently, I would suspect that many of the exact same machines and processes are still in use today, albeit with some updated CNCs.