To add to the new Pulse Rifle ecosystem I have designed (and ordered from China) a tiny Power LED driver board. This will take the firing pulse output from the pulse rifle or smart gun boards (EX connector) and use it to control a high power LED (the MOSFET is actually rated up to 10A, so kind of overkill, but we don't want it getting hot if we can help it...).
I'm planning to couple it with what I hope are the perfect LEDs. 3W "CREE" LEDs on a 10mm round (or almost round) aluminium board. It should be a perfect fit for the end of most barrels (since M41A ammo is supposed to be 10mm x 24mm caseless).