Ar 15 grip camera stabilizer gimbal

my own version of a camera stabilizer, with bearings, utilizing someone's ar-15 grip.

uses some bike bearings and 8/32 hardware. since this was modeled with 123design its not really 'parametric'. so this is more for myself.

Used:

Qty 4: http://amzn.to/2lI5eEj 8x16x5mm Bearings
Qty 4: http://amzn.to/2m415Wo 8-32 Machine Screws

I didn't make the ar15 grip, i found it on here somewhere.