Huben Airguns Silencer Adapter GK1 Pistol 1/2UNF

This is the original silencer adapter from Huben Airguns for the GK1 pistol to 1/2UNF.

See video attached to the product for mounting the silencer adapter.

Using a 7mm allen wrench, unscrew the normal end cap, swap it with the silencer adapter, it should be screwed back in the same way.