I had a PowerTac Warrior tailcap on my Alpha 315 for a while. It has a button for on/off and a side button with 4 levels, strobe and memory. Eventually the novelty wore off since it had parasitic drain and if you cut the circuit it always started on moonlight.Well yes and no. The elzetta tail will screw onto a malkoff body but only a few turns. You have like a 1/4 inch gap. Not sure if it’s waterproof at that point.
Never tried it on other Elzettas.