CMMG firing pin life expectancy?

[Gazza]

Any idea of a price yet Mr Paa?
I've got a spare but I can see me going through these standard ones quickly since I've discovered the CMMG is an excellent bunny gun.
When you have a few together its like the St Valentines day massacre

[BamBam]

What ammo are you hunting with?

[Gazza]

What ammo are you hunting with?

I was using winchester subs as i got a good deal on them but cci standards are no louder at all and a load cheaper so will be using them when the subs are gone.