Win Mod12 Trench Gun Conversion

[Madcap]

Is the magazine spring and tube the same length for commercial and military trench guns? Been looking for a replacement spring with surprisingly little luck. I did find a replacement stainless spring made by Wolf but before I order I want to be sure....I'm leaning more to converting this 12 to a trench gun I think.

Information

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[Madcap]

Is this 12 Ga "New Factory Original, Vintage" spring OK to use ....? The eBay seller laid it out sorta straight after a request.
I need a replacement....

[baltimoreed]

You only need enough extra spring to get that last single shell to feed reliably. Were not talking about a luger that you use a tool to load the magazine because of it’s heavy duty spring which is needed in order to get rounds to feed fast enough to run the exceptionally fast toggle action.

[browningautorifle]

Were not talking about a luger

Agreed...

[Madcap]

A friend of mine didn't want this Riot barrel and offered it to me yesterday for a price I couldn't refuse. It has a clean parked finish, "CYL", bore ordinance stamp and 1940 mfr date. Bore is mirror except for a small apparent rust spot inside....I guess I'll have to start looking for the rest of it now.

[baltimoreed]

I was always under the impression that M12 barrels were very difficult to change out and fit to another recvr but also required special Winchester tools and M12 parts to fit to a different recvr. I’m obviously not a gunsmith and could be wrong, often am.

[Madcap]

Yes sir, I'm from what I've seen online, it would require a gunsmith to attach a receiver extension to the barrel properly and with the equipment or tools.

The barrel was too good to pass up and so far I've just been reviewing replacement extension options and prices. Something might turn up somewhere.

[Madcap]

I want to replace the existing forearm on my Model 12 with one that looks like a Trench or Riot Gun forearm. I think they were 18 groove and straight.

So far I can't find any information on how to separate the action slide from the forearm.
I can disassemble up to and including removal of the action slide screw cap but beyond that I'm unsure and don't want to mess something up.

If Tom or anyone else that could help with the correct procedure it would be much appreciated...

Thanks,

Dick

[browningautorifle]

To remove the wood from the pump, you need a special spanner to remove the nut at front. If you look at the schematic you see the part(3) is unscrewed from part (1) and the wood slides off. The wood has been on a long time and is stuck. Maybe dried oil or varnish. Just go easy.

Winchester Model 12 Parts | Numrich Gun Parts

[Madcap]

Hello Jim, .... removing the action slide screw cap hasn't been much trouble but the wood and slide action were my concern. I wasn't sure how the arm was originally attached to the slide action.

Just to confirm - if the front end of the action slide (where the cap screws on) is tapped on, the arm and action slide should separate....is that correct?

Thanks for the help,

Dick