I am trying to build deactivated/airsoft Suomi M/31 as my school degree work. Even tho i live in Finland and it's a Finnish gun i can't find any blueprints on my own. I mainly need the measurements for the external parts.
Barrel cover OD and length, barrel cover vent hole width and length, receiver total length ( inc. end cap) and diameter, end cap length and diameter, total length from end cap to muzzle.
Basically i plan to draw the outline into a CAD program using the above dimensions, then overlay a photo of the gun including stock into this.
Hopefully i will get the rest of the dimensions from this.