a metallurgical question

[ithacaartist]

Huzzah! We haven't heard form Eugene, the Lugerman lately. Nonetheless, It eventually occurred to me that if anybody was likely to have the specific practical experience with this stuff--making parts--it would be he. While I was at it, I asked how the .45 Lugers were coming along...

Hi,
I am moving in to a bigger shop so the 45 are a bit on hold.
I got breechblocks 85% made for it so.
I do not know much about KGP guns or there constriction,
For a Luger p08 extractor I'd use 4140, heat it till cherry red, dup it in
oil, and then sand blast and dunk it in hot solt at about 500-550 till
purple blue, that will make it in to 52-55 hard.
If it's a spring loaded extractor then 1095 is perfect for it, same head
treatment.
Thanks.