Thanks for the advice.
The reason I ask is I have a 16 ga. NEF SB-1 to sell, but I also have a Handi-rifle that needs a new hammer. I have the 16 ga. listed on Gun Broker, but if it doesn't sell there, I may just piece it out; sell the barrel, and use the hammer in the Hand-rifle. I just have to educate myself on taking the NEF action apart and reassembling it.