Frank, here is a Specialty that I own that has a reinforced splinter that is a bit different than the usual one you see. It is a gun made in 1917-18 and is not a 3" gun, it has a splinter f/e. I have seen a couple of other ones on the auction site with this on them, must have been something Hunter Arms was experimenting with. as you probably know, Fox used something similar on their early guns.