Well dang, they got that composite chassis pretty lightweight! An MFT minimalist stock/skeletonized buffer tube is 9.8oz including a regular castle nut, and an ultralight folder mechanism like the btfa from SB tactical is like 3.4oz, so if you subtract that all out, the chassis frame, grip, and handguard have to be under 12.8oz! That's less than the bare HNT26 chassis from MDT (magnesium chassis, carbon fiber grip and carbon fiber hand guard)! But a fraction of the cost!
So, how rigid is the composite chassis frame? Any sort of aluminum bedding block or pillars in there?