I have a set (2) of Savage Four-tenner inserts that will fit in your 12 ga. SxS or O/U so you can easily adapt your shotgun to shoot .410 shells. Both are 12" long w/O-rings. They are the heavy metal inserts (not aluminum) and are still in the original box. Both are in great condition. I can send a pic if needed.
I would like to swap these for a nice matching numbers Romanian kit.
Each of us will pay our own shipping.