Buttstock sliding when shooting (Fixed)

[FRB6.5]

Looking closer, that is a knock off of a Fab Defense GL-SHOCK. It is likely made for airsoft use not on a real firearm.

https://alleghenyarms.com/wp-content/upl...107038.jpg

You can see the subtle differences with markings and some of the design.
A real one will cost you $120-140