Airsoft Shotgun to M4 magazine adapter

thingiverse

This lets you use standard M4 magazines on airsoft shotguns that fire shell type cartridges. It was designed specifically for the Franchi 3 barrel shotgun but will also fit other makes just as well. To get started, you'll need a small bolt and pen spring to attach the magazine clip. This is version V, featuring significant reinforcement over previous versions, and has been uploaded separately. Assemble by gluing and screwing the shell into place through the provided holes. I find it helpful to use a drill bit to keep the shell aligned with the main housing while screwing in the screws. The rail attaches on the right side and is completely optional. It prints smoothly using standard settings on my Anet A8 (Prusa i3) with PLA filament.