Swiss Hispano Suizza MP43/44 drawings - The Swiss Kp31.

[USMCsean]

While browsing the Swiss archives, I found the fabrication drawings for every part of the Swiss MP43/44, which was a licensed copy and adaption of the Finnish Kp31 SMG. They were high resolution scans. So the details are top notch. 
 

I started doing some modeling and so far, this is what I’ve been able to get done so far. I will reproduce the whole thing. 
 

The motivation for doing so, is that I have a few Finnish Kp31 kits. I also have a Swedish M37-39 kit; which was a licensed copy and adaption. They made their own changes to it, as did the Swiss.
 

I will have the geometry of the trigger pack modeled and then I’ll be able to come up with my own semi-auto trigger design and be able to use it in the three variations. 
 

[DEW]

Great find, did you by chance find any drawings for the Furrer MP41/43?

I would like to buy a copy from you if you have, can or did find them.

Send me an email with the details. Thank You Very Much

 

[arma15]

Do you happen to have the measurements for the reciever.  I need to remake a reciever tube to machine then weld for a post sample.  Sounds like a fun project, mine will just use all the orginal parts. 

[Rekraps]

Very cool!

[USMCsean]

On 5/10/2026 at 1:22 PM, DEW said:

Great find, did you by chance find any drawings for the Furrer MP41/43?

I would like to buy a copy from you if you have, can or did find them.

Send me an email with the details. Thank You Very Much

 

I can look. 

[USMCsean]

On 5/21/2026 at 3:23 PM, arma15 said:

Do you happen to have the measurements for the reciever.  I need to remake a reciever tube to machine then weld for a post sample.  Sounds like a fun project, mine will just use all the orginal parts. 

I'll see what I have. I'd love to have a Swiss Mp43/44 kit.