Take it to a gunsmith.
Remove cylinder - remove firing pin pin located under rear site - use finishing nail/small center punch ,place against back of firing pin and tap lightly driving pin toward "removed" cylinder
Best left to a S&W factory trained gunsmith.
You let a gunsmith do it.
You need a gunsmith
Best left to a gunsmith
Get help from a gunsmith
Best left to a gunmsith.
Find a good gunsmith or machinist
Pull the triangle pin out from under the barrel and then slide the revolver out to remove bullets
google it.
Remove the firing pin from the rear and the locking bolt will side out the side of the bolt
This would be best left to a qualified gunsmith.
A firing pin that is mounted on/in a hammer