[Sacajaweau]

Took some thinking to come up to that. Thanks for doing it. I feel that I’ve learned something today. Just not sure what.

[Navy Patriot]

Headstamps are very interesting reading.

However, I am a firearms enthusiast.

[Moltke]

Clip is short for stripper clip:

https://en.wikipedia.org/wiki/Stripper_clip

A magazine is a storage container for bullets that is detachable from the weapon.