It is an interesting thing how much all of those things overlapped one another. For instance, the M1 rifle was introduced in the later 1930s, yet Great Britain was still manufacturing Lee-Enfield bolt actions 20 years later--just after we quit manufacturing the M1. India was still making Lee-Enfields ten years after that.
Even more interesting is the resistance the M1 met when it came along. Inaccurate was the most common complaint.
Shoot low, sheriff. They're riding Shetlands!
Underneath the starry flag, civilize 'em with a Krag,
and return us to our own beloved homes!
Buy War Bonds.