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Best 3-5 Inches: Fenix RC11. Best AAA Keychain : Titan Plus.

Completely Proprietary . Best (5 – 7 Inches): Streamlight

Best Keychain : SideKick.

https://en.wikipedia.org/wiki/SureFire

https://en.wikipedia.org/wiki/Surefire:_The_Best_of_Econoline_Crush

https://en.wikipedia.org/wiki/Surefire_(song)

https://en.wikipedia.org/wiki/Sure_Fire

Tactical LED Flashlights by SureFire

SureFire 6PX Tactical Compact LED Flashlight