Holosun Technologies 407C-X2, Red Dot, 2 MOA, Black, Side Battery, Solar Failsafe, Mount Not Included HS407C X2 The HS407C is an open reflex optical sight designed for pistol applications. Features include Holosun's Super LED with up to 50k hours battery life, 2MOA dot only, Solar Failsafe, and Shake Awake.