I think that's the transfer bar. Just under the hammer and raises to hit the firing pin. It's a pretty new model flattop blackhawk with the fake ivory grips in 45acp/45 long colt. I feel naked if it don't shoot.
The question is where do I get one? Ruger or Brownells?
Transfer bars and assorted screws all belong in your spare parts kit.
Bob Wright
I thought Rugers never broke.
a cottage industry popped up a few years ago that removes the transfer bar and welds up the hammer face so the hammer will strike the firing pin directly.