Electro penciled parts are common, some of the numbers in the 00-000.000 format are more or less like part numbers. But electro penciled serial numbers are possible also.
As for the firing pin, thats always a touchy subject. I, personally have never had the slam fire issue with any of the ones I own. But, I don't frequently fire American made ammo either. I do keep the firing pin channel clean, check the pin for straightness and use little if any oil on it or in the channel. The oil can attract soot, carbon and debris which could cause sticking. If you notice a popped primer, stop firing and tear the bolt down, check the pin, as that can bend the pin just slightly and given the close tolerance there, any bend could cause binding. Just my
Others, swear by the spring loaded aftermarket pin, Russia used them in the early models, but went away from it. A popped primer would destroy the spring given the heat and pressures involved, and then your back to a chance of a stuck firing pin due to the spring being tweaked.
Any weapon with a free floating firing pin can in theory suffer from a slam fire
![big shock :beek:](./images/smilies/eek.gif)
. An M1 Garand, M1 Carbine, M14, the French Mas 49/56, all have free floating pins.
I said I was an addict. I didn't say I had a problem.