Lightweight 260 Dingo build

Ok, long story short, I've been in contact with a few YouTube personalities, both of which live close to me. They're wanting to test our brake, but I'm wanting them to test our cartridge. As much as I want to send them my full blown, all out stainless truck axle barrel, 40x action, MDT ESS chassis, and Atlas bipod, long range rig, I want them to understand the massive reduction in recoil our brake causes. I'm wanting to build the lightest possible rifle (whatever action). Anyone know how I can lighten an already lightweight rifle? I'm assuming stock with a featherweight contour (Shilen-esque). I'm kinda stuck on the stock options though.

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