Airsoft electric toy gun mk3

Airsoft electric gun with custom 3d printed gearbox. Uses TM-compatible parts for gearbox v3 and m-series mags. Barrel length 455 mm. For extra toughness of construction used 10x20 mm alluminium channels. Full-auto only.
Gearbox tested with 148 m/s (487fps) output and works well.

Upd 10/06/2019: Added video of shooting:
https://www.youtube.com/watch?v=STos1IOZB0s
Added video of disassembly. AEG can be assembled in reverse order:
https://youtu.be/76tCkqQzGN8

WARNING

Project is long, plastic-consuming and require both good 3d-printing and airsoft technican skills. Use safety measures, as with any airsoft rifle. Wear protective glasses anytime while working with this project.

All parts must fit into small printer, maximum length of detail is 190mm, maximum height about 100mm (one tall detail, may be printed in parts). Top rail length is about 235mm, it may fit daigonally in 200x200 hotbed, or be cut into halves, like in perfect remix by wildshark: https://www.thingiverse.com/thing:3534980.