I bought a threaded adapter, that fits over the front sight mount, and tightens down with 2 set screws. I then used a multi bit to enlarge the opening on the opposite end of the fake can until it was large enough to slip over the adapter, and screwed it into the other end. I used a oxidizing agent to darken the aluminum that was drilled away.
Right on! Time to give the wallet a little more of a shakedown.