Holosun HE515CT-RD 1x 20mm Red Dot - 2 MOA Dot & 65 MOA Circle - The HE515CT-RD is a 20mm micro optical sight designed for rifle and carbine applications. Features include a Titanium Housing, Solar Failsafe, Shake Awake, 12 brightness settings, Holosun's Super LED with up to 50k hours battery life, Multi-Reticle System, QD mount, Kill flash, and Clear Lens Caps. MRS:2 MOA Dot; 2 MOA Dot & 65 MOA Circle; Up to 50,000 Hours Battery Life (Setting 6); 12 Brightness Setting: 10 DL & 2 NV Compatible; Tray Battery Compartment & Titanium Housing; Parallax-free & Unlimited Eye Relief; Quick Release & Detachable Mount;