This is a Stock attachement to use with Gruneun`s "Nerf Stryfe PVC Stock Adapter" from Thingiverse.
Use his shoulder piece in combination with this gun adapter.
PVC pipe fits snuggly in the end, the Attachement clips perfectly on the Gun (Electric and Spring).
Use an M6 Bolt and Nut to hold both pieces together and tighten the bold to keep the stock in folded or unfolded position.
A Wing-Nut is recomended.
Be a bit careful with the small pins that secure the whole thing on the gun.
They dont need much force to release the Stock, but could still break easily, depending on your Print (material etc).