Mags may have had their day, but outside of doubling as weapons, they are poor choices for flashlights these days. They lose on weight, efficiency, and most importantly, output. I have a fleet of mags, and they're there for light, but mainly for their other capabilities. I did swap out the bulbs for the Terralux inserts and they do perform better, but not on par with smaller lights with real heatsinks and MUCH better efficiency and output.

I'm not eager t part with mine just yet as they have another purpose. But if it is really light I seek, mags aren't the first things I grab.