No problem skeettx, I can relate. I'm pretty certain that the parts shown are for a 12ga gun. The firing pins shown require the use of a seat which threads into the receiver which is consistent with 12ga guns I've seen pictures of. In fact I have those parts from a purchase I made off eBay. My receiver isn't threaded to take the seat. Been awhile but pretty sure the pins don't even fit in my receiver.
Kirk