I learned that my newer 10T-ST has an adjustable firing pin, and I accidentally changed it from the factory setting. I made the firing pin extend it’s maximum length into the primer. I learned this was a bad idea when I took my first shot with the adjustment.
I pulled the trigger, the gun fired, and the firing pin extended so far that it made the case pop out of the bolt face. The case was stuck in the barrel and the extractor came apart.
After I found the small bearing and spring, and figured out why it all happened, I put the extractor back together, adjusted down the firing pin, and got back to normal shooting.
Now I know that it’s not a great idea to tighten the firing pin spring a lot and then adjust out the firing pin.


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