I think that Big Blue Boy did

I think that Big Blue Boy did a plastic injection model of these a few years ago...

I don't know who built it...

But I remember seeing a model - huge thing - of one of the railway guns in the contest room of an NMRA convention a few years back. 

Here it is...

1/35th scale:  https://forum.mrhmag.com/post/jeffs-at-the-nmra-convention-12184307 (scroll down). 

Neat video

Thanks for that Brian.   I have built one of those Leopold kits before.  
 

Jeff, have you ever checked out a Dora kit?  Last one I saw for sale was $2,000 !! But pretty incredible when they are built. 
 

Squardron Hobbies in action books has lots of info if someone wanted to build an accurate model with either kit.  

The Krupp K5

Ah yes

the most common Railway guns used by the Germans during WW2 were the Krupp K5 and K12 class railway guns, I believe they had the capability of firing over the English Channel as well.  I happen to be working on a smaller railway gun more akin to the British railway guns of WW1 and WW2 using a well car as the base.  I can provide more detail after I give a quick look through my book on railway guns. What type of information are you looking for on them?

Railway Gun model kits

Railway Gun kits  on EBAY

https://www.ebay.com/sch/i.html?_from=R40&_nkw=railway+gun&_sacat=220&_pgn=1

Leopold Railway Gun

Check out this one on YouTube:

Carry over idea from WW1

"The Germans were not alone in this pursuit, but in the end, the railroad gun’s usefulness did not live up to its reputation."

and

"The gun was designated Schwerer Gustav. The 80cm gun, weighed 1,350 tonnes and could project a 7-tonne shell 29 miles. It was completed too late for the German Army’s attack on France, in May 1940. The artillery unit-to which it was allocated in January 1942, named the gun Dora. It fired 47 rounds, against the city of Sevastopol, in the Soviet Union-wearing out the barrel in the process. The second gun produced by Krupp, Schwerer Gustav 2, was never used in action."

The biggest weakness of the

The biggest weakness of the rail gun lay in another technology that came to prominence at the same time...

The fighter-bomber...

That’s true

All of these points are rather accurate, as railway guns did make large targets for aircraft that were flying above 

Ah, Aberdeen...

I went to Aberdeen proving Ground twice in the Army. First, for 3 weeks as a ROTC cadet for my post-advanced camp training with an active duty unit, which was a joke because it was a training unit and my sponsor CPT was never around. It was a three-week vacation and I'd rent cars each weekend. But I would often go down the museum to drool over their collection and all the tanks parked out back. I used to look at the Krupp K5 there often.

the following year, I was Army Ordnance 2LT, going through the basic branch officer course there. It was almost 6 months of skating as PT was a joke and you'd have to be brain dead not to pass the tests. I was never around a single weekend the entire time I was there, as I'd go out looking for military and railroad stuff. One time, I led a PT run past the museum and there was a family looking the gun over, speaking German as we passed them. I still retained my college German at the time and started talking to them, running in place. Turned out, it was the grandfather and family, and the old guy had crewed one of those guns in Italy. I called an end to the PT right there and we all talked with the guy until we had to head back to the BOQ to shower and change for the duty day. I didn't get the guy's name, sadly. A month later, same thing happened at the end of the duty day and this guy was one of the GIs that found both the K5s at the RR yard at Civitavecchia. I had a nice talk with him, too.

My wife and I were on a Europe cruise in 2018 and our boat docked at Civitavecchia, but I didn't have the time to do the Rome trip and try to find the yard where the K5s were found...

We also didn't have time to find the other K5 at Pas-de-Calais, as we only had time to get to Normandy before our cruise for a couple of days. I would have loved to seen that one, too.

Aberdeen

Yes my father was a Sargent-Major stationed there after we returned fro 2.5 years in Austria. We were there for quite some time while my father went off for several tours to Korea,..leaving dependents behind at that time.

I got re-started with trains when i found that American Flyer was more scale like than Lionel I had for a sort time in my younger years. I even decided to try and make scale like track by adding multiple wood ties. That came to a halt when my shop teacher at the time cut the very tip of his finger off trying to show me how to cut those on a table saw.

It wasn't long after that that I discovered cars and girls,....goodby trains,...till 15 years ago when I returned from Asia at 60 yrs of age.

Allied version

At a sale price the OO / HO Allied version of WW1.

I'm not into this type of Warlords stuff, but might interest you.