That is the old style firing pin.
I had a new style one that also got damage to the tip, but also broke. Call Robinson and email your pictures to whoever you talk to. They'll set you up with a new fp.
There still seems to be some issues with the firing pins. This was mine after ~400 rounds.
I couldn't figure out how or when this happened because I went through the breakin period with no trouble whatsoever, and after a cleaning the rifle it wouldn't fire at the next range trip. I'm inclined to believe maybe I dropped the bolt or maybe the fp broke during the extensive dry firing I did with the rifle to work on the trigger. Who knows...in any case I love shooting my xcr and it has fuctioned perfectly since replacing the fp.