Weapon lights mount to pistol and rifle rails so you can identify what's in front of the muzzle — the non-negotiable accessory for a home-defense gun. Streamlight's TLR series covers everything from micro pistol lights to 1,000-lumen duty heads, SureFire Scout lights own the rifle world, and Olight brings magnetic-charging convenience. Match the light's footprint to your holster before you buy.