Gas blocks for ar15,3 position

[tp555]

Made some gas blocks that have 3 position options.They are: closed for low pressure (subsonic),Open (max bleed off single shot) and partial ( hi pressure,high speed, .050" hole for gas bleed off). I offer 2 ways to do this.A lever or socket-slot is on the rotating pin.If you got a full length gas tube setup
then the lever would be recommended.If you got a pistol length gas setup you can drill a hole in the right location and insert allen wrench or screw driver to
shift. Requires modding your gas tube by drilling out the end plug.Materials can be carbon steel,Stainless or aluminum.I cannot color aluminum.Don't know any local sources for this.Can parkerise the carbon steel material.Sizes available: 3/4'.7/8" and .936 or .937" dia. Cost about $60 for the two steel versions and $50 for the aluminum ones.Pics show two 3/4 size SS and .936" blocks,carbon in
the white.