Winchester '44 barrel & stock markings

[photog]

USGI,
National Ordnance used same/similar set up.

You think this would work if they used the 03a3 barrels and demilled carbine barrels that had swaged cylinders?

A picture of the OP's muzzle and chamber may help.
Could compare to the pictures halfway~ down this link:

National Ordnance

fwiw,
Charlie-Painter777

Here you go. Looks similar to the photo of the 03a3. Pretty clear there are two layers- inner replacement barrel and outer original "sleeve" It shoots really well and the replacement appears to be done cleanly/professionally. I think I'll keep it and chalk it up to experience.