Please follow this link if you need help to make it:
https://medium.com/hackerloop/we-made-a-diy-prosthetic-nerf-gun-2cfd865cde0e

March 2017:

This collaboration started in december 2015, when we met with Hackerloop at Le Web in Paris. Few months later, we met again for a proof of concept:

April 2016:

…1 year later…March 2017