Have a BRN180S 300BLK upper on my SBR lower, runs like a top. Did a Manticore triangle with a folding hinge, the whole rig is great with one exception. As shown in the picture, the stock, mounted as low as possible, still sits about 1/4” high for my comfortable cheek weld. Not bad, just a bit higher than I would have wanted. I’d still like to use the triangle. Anyone have a thought for a lower profiled hinge that would work on my standard sbr lower receiver?

sorry, I can't see the picture.

I used a KNS 1913 adapter on mine and got a triangle folding stock that accepts 1913.

I use the KNS 1913 adapter as well with a JMAC stock. I can easily adjust the stock up or down a notch if needed without there being some obnoxious overhang from the hinge.

why not just get a riser for the optic if you want to keep the stock?