I came into a collection of parts and have kept what I want. These are most, if not all, the internal parts for NEF/H&R SB1 shotgun frames. Firing pins will all be the larger diameter for firing 209 primers. I don't want to monkey with selling individual parts. If you must have just one part you will need to buy the whole kit. However, feel free to verify via PM the part you desire is in the kit. I will accommodate to the best of my ability.
3 kits are available for $45 shipped per kit.