HOLOSUN HS515GM / HE515GM-GR 2 MOA Dot & 65 MOA Circle Micro Sight for Rifle - Waterproof Dustproof Shake-Awake Parallax-Free Sight with Multiple Reticle System & 12 Brightness Settings - Red/Green Options. HIGH PERFORMANCE - This Holosun sight for rifle features our MRS (Multi-Reticle System) with Red Super LED, 12 reticle intensity settings, Shake Awake technology, and up to 50k hour battery life; The battery is housed beneath a side mounted cap for a tool-less replacement. MULTI-RETICLE SYSTEM - This Holosun red dot sight is equipped with MRS to let you select a fast sight picture for shorter distances with a 65 MOA circle with 2 MOA dot; The large circle allows for a hold-over reference and helps guide your eye to the 2 MOA dot; The large ring can be deactivated leaving just the 2 MOA dot for an uncluttered sight picture and increased precision. SHAKE AWAKE TECHNOLOGY - Extends battery life by deactivating the optic's LED while not in use; Shake Awake offers settings from 10 minutes to 12 hours depending on the model and can be deactivated altogether if preferred; The slightest touch of the optic instantly reactivates the LED so your Holosun sight is ready when needed.