It probably is fake. You can buy the counterfeit version (listed as a "Surefir") for $60. I'm not suggesting that you buy it, especially when life and limb is at stake, but a lot of these reproductions are pretty darn good. If you won't buy a Surefire because of the cost AND you have a spare $80 lying around you might get 80% of the light for a third of the money.