Holosun Technologies 407C-GR-X2, Green Dot, 2 MOA, Black Color, Side Battery, Solar Failsafe HE407C-GR X2 The HE407C-GR is an open reflex optical sight designed for pistol applications. Features include Holosun's Green Super LED with up to 50k hours battery life, 2MOA dot only, Solar Failsafe, and Shake Awake.