Gas blocks for ar15,3 position, pt2

[rockman96]

Originally Posted by tp555

Redesigned the gas blocks.Now closed position is totally closed.Other positions are lo and high pressure.Requires cutting about 15/16" off the back of the gas tube.New is a on-off block with the button.This was requested by law and military.They want a simple open or closed solution.I call this block the milspec.
Shown are stainless steel and the very first prototypes.

Are these still available? PM sent.