I picked up a somewhat beat 39a for what seemed like a good deal at $175. The first attempt to fire it resulted in a click not a bang, a quick inspection showed a broken firing pin. No problem, order two from brownells. I finally managed to find some time to put the new firing pin in, and made it to the range. The upside is the gun goes bang, the downside is it doesn't do it every time, it's about a 50% thing with no rime nor reason as to where rounds are in the magazine.

The hammer doesn't seem to be hanging up on it's travel, so I'm thinking perhaps the hammer spring is week. Any other thoughts on the matter are appreciated.