I recently acquired a non-working H & A 922  .22 rifle. I bought it as a learning experience, and it's been fun. I made a return spring from an old plane blade- annealed the steel and shaped it to match the fantastic drawing on the Numrich site. Out of stock on almost everything, so I plodded forward. I hardened the spring- cherry red, water quench, them heated it with a torch until it turned blue, and it works great ! So, I put a bolt in the coal stove and turned a firing pin on my unimat, and with some time spent fitting the travel notch in its shaft and a new
pin, that works too. The ejector is missing as well, and I see that in the drawing, so I guess that's next, though I would love to just buy one.
But my question is: Do I harden the firing pin - What is protocoal here ? Sorry, I'm a total newbie.