This is a modified version of the Flux Defense Raider Buttstock designed to fit the Invader P320 V1.0.

Most of the modifications included making the holes and rail cutouts line up, mostly a combination of two files and then I smoothed it all up.

I printed it in the PAHT-CF but that's because I wanted things to match. Anything would do, probably ABS would be good.

The Butt pad is printed in TPU but it doesn't feel all that much softer than PLA - I don't know if it is worth it.

Complete this with two M4x12mm screws for the rails (you need to widen the holes on the rails to fit the M4 screws). The butt pad uses two M5x8mm screws.

Printing: 3 walls (more the better), 25% gyroid infill. Nothing fancy. Orientation is with the butt on the plate and the rail slots up in the air. No supports are needed. A brim might help with adhesion but isn't always needed.

I don't have any good settings for the butt pad.