As usual you are absolutely correct, and if we don't understand the meaning, without it, we can give the exact terminology for every piece. To be correct, the piece in a "HAMMERLESS" rifle, you refere to as a hammer, is, in fact, called a tumbler, not a hammer, but origenaly it as called a striker, because the fireing pin was part of the tumbler. This was called a DOG TOOTH striker, and was simply a pertrusion on the nose of the tumbler that went through a hole in the breech to contact the primer. The body of this piece was only called a tumbler, after the the pins were seperated,from the main body of the striker, and the body of the origenal "STRIKER" became a "TUMBLER"!

The external "HAMMER" was origenally called a "COCK", so either is correct, if one needs to nit pick! The fact is, 90% of the people who read this couldn't care less, or would even know the difference!

I edited my post to reflect this terminology, if that is absolutely necessary, though I don't think it makes the meaning of the post any clearer!