My M900s main incandescent lamp works but the LEDs don . Whats wrong?
You have probably installed the batteries with the polarity reversed. To fix the problem, remove the batteries from your M900’s battery compartment and re-install them with the positive (+) end going into the compartment first. If the LED’s still do not turn on, call SureFire at 1-800-828-8809 and ask for Customer Service.