Sima shows how to assemble a 3D-Printed Over-Under Airsoft Shotgun with the STL files available at Cults3D... "Airsoft Over-Under Shotgun designed to work with gas powered shells (Madbull/PPS Airsoft/ APS). Mostly 3d Printed, excepting some springs, pins, screws and some electrical tubing for the barrels.

Features:

• Separate triggers for each barrel
• Functional safety
• Barrel unlocks by swinging the lever to the left OR to the right
• Functional shell extractor
• Modular. You can make it short, sawed-off, or you can make the barrels as long as you want by adding the foregrip and as many rib segments as you need
• detailed video assembly guide on youtube

All the parts in the images fit in the Ender3 build volume.

Do not expect it to be an indestructible replica, if you fall on it, it will break. It is cool and it is very reliable as long as you do not abuse it."