Check out V2 for a sleeker look and better camera angle.
A baseplate, I made, for chin mounting an action camera on my AGV K1S (Shell size XS - M)
You will also need a “j-hook” like this as well as adhesive to stick it to the front.
I have ordered this set from Amazon since it contains everything that is needed.
Print standing upright - Supports are required (on build plate only).
I recommend ASA or PETG.
I 3D scanned the front of the helmet and then simply designed the baseplate in fusion 360 and cut it with the surface from the scan.