Full metal high scope mount base.
Convert 11mm rail to 20mm RIS weaver rail.
Also raising up the mount base level on any 11mm mount base.
Increase the height of the flattop for easy aiming.
Adaptor is installed by allen wrench (included).
Can install any 20mm red dot or scope onto this high scope mount base adaptor.
Length:90mm
Rail type:20mm/11mm
Weight(Gram):100