All you would need for the 3d printing a mag would be the spring, everything else could be printed. Hmmmmm good idea, I'll have to try one. Maybe a nice alternative to these crazy prices. I can buy all of the parts straight from Glock except for the mag tube, we can't even but complete mags anymore.
Certified Glock Armorer
G17RTF2/G, G19RTF2/G, G22RTF2/G X2, G23RTF2/G, G23CRTF2/G, G31C RTF2/G Custom
G17, G19, G20, G21C, G22C, G26 X2, G27, G32, G33 All Gen 3.
Ruger Security Six .357 Mag.
Ruger Super Blackhawk .44 Mag.