The night vision-compatible Meprolight M21 reflex sight is powered by ambient light through a fiber optic system and by tritium in total darkness. Whether you choose a bullseye, triangle, or dot reticle, the brightness self-adjusts to any light condition. With no switches, electronics, batteries, or internal moving parts, the M21 is unaffected by water and runs in battery-killing cold or desert heat. The Meprolight M21 is always on and always ready. It's available from The Mako Group, exclusive distributor of Meprolight combat optics.
With low cost .22LR ammo and a 16+1 capacity, you can nail paper bad guys for pennies a pop.