I have a Thompson Center Tree Hawk that I bought used and had no idea that when new it came with two barrels. A .50 cal rifle and a smoothbore 12 gauge barrel with removable chokes.
I have looked everywhere to find a 12gauge barrel with no luck.

My queston is-- Will a New Englander shotgun barrel fit my stock?
I did find one of those.

I would love to take a turkey with it.
From what Ive read the Tree Hawk isa camo version of the White Mountain Carbine but it is also compared to the New Englander. From what Ive seen the barrel should. Its longer and has an extra under rib for the ram rod

If the barrels are the same diameter I don't see a problem. I have a T/C 54 Hawken and a 50 cal Renegade that I swapped barrels, Both are 1" barrels with a hooked breech fit like a glove. :D

The pics I saw online make the barrels look the same. Both with hooked breach and round barrels but I dont know the diameter on the new englander.
Thanks that does help

Just try to fit it. Don't force it mind you, but if it will fit it should go into place with little effort.