Have yet to hear a range report on the proprietary 'Blackrifle' firing pin...I guess they have done their homework and it'll work fine for a long time.
However...there are also factory S&W firing pins available this side of the ponds for the princely sum of £20 from tactical solutions.
So we are now apparently spoiled for choice
Still on my original pin...must be pushing the 15000 round count by now, probably more. Nice to know that they are available should the need arise. Might add one to my birthday list, my Hogue storage compartment still has room.