Hard coat type 3 milspec anodized finish, solid precision machined construction.
This AR 223 Micro Gas Block for barrels .
750 is used when installing a rifle length quadrail to allow the quadrail to slide through the barrel.
The gas tube mounts to the micro gas block just like it would to your regular A2 post gas block,
but it is sleek and small to allow a longer rail to be placed
Hard coat type 3 milspec anodized finish
Buttom has 3 screws !!