This is a 3d printable AK magazine speed loader for AK magazines in 7,62 and 5,45. It was inspired by the podavach U-Loader with the goal to make it 3d printable on a standard 3d printer.
It gives you the ability to load AK mags at least as fast as doing it by hand, while saving your fingers. You simply place as many rounds as you want to load in the track and place a magazine in the appropriate spot.
While holding the magazine you push the charger down the path and feed the rounds into the magazine.

Compatibility 
tested with 
 7,62x39
 -Russian Bakelite
 -East German steel
 5,45x39
 -Russain plum
 -Russian true black
 -Russian Bakelite
 -East German Bakelite
 -Romanian steel
 -Russian 45rd (can't load 45rds at once)
 5,56x45
 - unknown (don't have access to magazines)

compatibility with new commercial magazines is unknown, should be achievable by modifying the mount

Printing
You should have a pretty good calibrated printer to start with, specific settings aren't that important, as this magazine loader doesent recieve to much stress.
As for the printer you'll need a one with at least 250mm of z-volume to print both parts standing up.
It may be advisable to print the tall pieces with a brim or some sort of adhesive, if you have problems with bed adhesion, as they have quite a small footprint.
I printed my example with a wall count of 4, but i don't believe this is really necessary.
The filament i used is Esun PLA+, but it should be printale in most filament.
after you finished printing the two pieces should fit together. Yo'll may need to file the little tab in the front of the magazine slot to make you magazines fit.
This is intentional, as this tab prevents especially the 5,45 bullet noses from catching on the front of the magazine.

printer settings
 nozzle size  0,4mm
 layer height 0,2
 Nozzletemp  205-225 (whatever works for you)
 Bedtemp   60 (whatever works for you)
 walllinecount 4 (whatever works for you)
 supports   enabled