Got it! With range update!

[Tony Min]

So I picked it up today. Took it apart and changed some of the springs. Cleaned and oiled the heck out of it. Used a bronze brush lightly.
I really like it. Not sure the mag is serviceable. A friend is going to the gun show tomorrow and I asked him to buy me a mag. If nothing is found he will lend me his to shoot it Sunday.
The mag is ok but the spring is so tight I can only get 4 rounds into it. I took it apart twice but not sure if someone changed the spring or what but I can't load it.
Pictures of the gun and mag below. Can someone identify the mag? It is something?
All numbers match except the mag. And repo grips. 1916 DWM. The straw actually cleaned up pretty nice. I love the straw on these things.
I love the gun. Finish it good with very light pitting. Not deep at all. Bore is shiny and perfect. Trigger is amazing. Very nice.