Rulloy86 does a quick overview of this project, a 3D-Printed MAT-49 AEG... "Hello, attached photos of 3d printed airsoft MAT49. Upper lower receiver are printed. However for another prototype I ll make an aluminium upper. Battery is currently located outside - but the split 7,4V should be possible to squeez it in. Gearbox V3 - cut here and there, small slim ARES motor, micro mosfet, AK47 hopup, MP40mags (unmodified) basic setup 110m/s."