Hori-Zone Redback RTS pistol crossbow stock

Update Feb 2025:
Version 2 released: a M4-AR15 based stock for the Hori-Zone Redback RTS Pistol Crossbow
This version is more pleasing to the eye and has a very snug fit with the OEM cocking mechanism. No extra screws needed. The bottom pad can be printed in TPU for extra softness / grip and needs to be glued to the base stock.
Best use PETG and a minimum infil of 50% (or even more) for a stronger result.

Version 1:
A snap-on shoulder stock for the Hori-Zone Redback RTS Pistol Crossbow (Version 1.0).
The front of the barrel is set to a 12 degree incline - to match the curve of the OEM cocking mechanism. Not a choice by design, but a practical one :-)

Can be secured with a Metal threaded insert and M4 / M5 bolt - the bolt can lock on to the grooves at the bottom of the OEM cocking mechanism. There is a hole at the bottom of the front for this purpose.
However, due to a snug fit, the stock also works just fine without any screw/bolt. For peace of mind you can add it, but it's not a requirement!
Best use PETG and a minimum infil of 50% (or even more) for a stronger result.