Holosun HS407C-X2 Reflex Sight Red Dot 2MOAThe 407C X2 is an open reflex sight designed for handgun applications. Features Holosuns Shake Awake technology to activate the LED at the slightest detection of movement and deactivates the LED during periods of motionless. The 407C X2 has 10 daytime brightness levels and 2 night vision compatible levels. 50,000 hours of battery life on setting 6 means you wont be changing batteries often, but when you do need a replacement, the convenient battery