Seen this tonight. A Type II (Flat) bolt with the gas relief hole. Don't see a 'hardness' punch mark on top.
Thought only post WWII Type III round bolts had this feature.
Described as un marked.
Anyone know if commercially made post war bolts were made like this?
Possibly cast?
I don't know....
Charlie-Painter777
M1 Carbine bolt type 2 flat | eBay
https://www.milsurps.com/images/impo...9/sl1600-4.jpg
https://www.milsurps.com/images/impo...9/sl1600-5.jpg