This part replaces the trigger guard on the FX Impact. It allows the air gun to be used with an Arca Swiss tripod and extends the area available for a pic mounted bipod. I uses the bottle to increase the stiffness and more or less eliminate deflection. It is a contact fit to the bottle, so it is easy to remove and install. EDIT: It is much lighter, and probably much stiffer than any of the aluminum after-market products.
I printed this out of BASF HTPA-CF15. Given the use conditions and the possible stresses, I would recommend something with low moisture sensitivity, good heat resistance and high stiffness like this material.
EDIT: I have replaced the original part, which was printed with the BASF material, with Qidi PET-CF. It can print with a 0.4mm nozzle instead of 0.6mm and has a higher print temperature at 300C. The smaller nozzle gives a much better finish, and it has been very durable.
It is designed to print diagonally off the front face for 2 reasons. The support required is minimal, and it keeps the primary forces from falling along the layer interface.
The author marked this model as their own original creation.