I was dry firing earlier this week when the trigger on my primary training P320 stopped resetting. Upon disassembly, I found that the leg on the rear of the firing pin had sheared off. This particular gun has about 2,500 rounds through it and probably 5x that in dry fire. Sig will fix it for free, but they wanted me to send in the entire gun and couldn't say how long it would take to turn around given current conditions. Luckily I had a spare slide that I could pull a firing pin assembly from. Sig was happy to sell me another firing pin assembly so I could keep from sending the gun in, so I'll have a spare again soon enough.
I did some Googling and couldn't come up with anyone reporting a firing pin failure like this on the P320. Any of ya'll seeing this in classes, matches, or agencies?
Pic (broken unit on bottom, functioning unit on top):