The HS503CU is a 20mm micro optical sight designed for rifle and carbine applications. Features include Solar Failsafe, Shake Awake, 12 brightness settings, Holosun’s Super LED with up to 50k hours battery life, and Multi-Reticle System.
 
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
Convenient Tray Battery Compartment
Parallax-free & Unlimited Eye Relief