Elzetta Designs' ZFL Flashlight is literally tough as nails. You can even use the bezel of the light to drive nails, if you want. OK, granted, you’re not buying this thing as an emergency hammer; it’s a light, and a fine one at that. It produces 235 lumens and features optical beam projection for uniform lighting and a patent-pending heat sink to keep the light cooler in your hand during extended use. Runtime at full power is 1.5 hours. Elzetta lights can be adapted for use on long guns with the company’s mounting rings. Available for around $150 with M60 body for long gun mounting and around $100 with standard body.