Holosun Technologies Micro Red Dot, 2MOA Green Dot with 65MOA Circle or 2 MOA Dot, QR Mount ARD Flip Caps, Side Battery, Black HE515GM-GR The HE515GM-GR is a 20mm micro optical sight designed for rifle and carbine applications. Features include 7075 Aluminum Housing, Solar Failsafe, Shake Awake, 12 brightness settings, Holosun's Green Super LED with up to 50k hours battery life, Multi-Reticle System, QD mount, Kill flash, and Clear Lens Caps