The barrle profile does fit the StuH 42 L/28, the thing at the end just not.
Does it? The Stuh has that thing at the base of
The barrel and this doesn’t.
As for the thing at the tip of the barrel, isn’t that just where the mount the muzzlebrake? If so then I doubt it’s the base Stuh gun since I don’t think it has that


The barrle doesnt need to have a muzzle brake, and the thing at the base is part of the mantlet front, which is missing in general.
Ok. Yeah I have no idea.
Maybe it’s for a barrel launched rocket? I have no idea lol
Not sure If this helps or not.
But I would assume you already know these information.
Here’s a couple finds from me.
An Sd.Kfz.10 with some sort of field gun. I’m not sure which type, though the source cites it as a 45mm cannon. However, I can’t say for sure whether that’s true.
Spoiler

An Sd.Kfz.10 with a PaK 36 field gun mounted on it, including an interesting muzzle brake.
Spoiler

An Sd.Kfz.251 with a French Hotchkiss 25mm CA mle 39 anti-aircraft gun strapped to it.
Spoiler

Sd.Kfz.251 with a 50mm PaK 38 field gun on top, modified in Tunisia.
Spoiler


Ts got a loudener 😭✌️
3/4 were already suggested. And thats not a muzzle brake, rather a blast protector for the driver i suppose.
Panzer III armed with a 150mm, idk if it can aim down.

Panzer I armed with three 15mm AA guns

Bergepanzer 38t with a 20mm flak

Captured KV-85, kinda cool ig. It was converted to recovery tank which is also kinda cool.

