Primary Arms SLx MicroPrism 1x Green Dot - ACSS Cyclops G2 - The SLx 1x MicroPrism is an all-new advanced optical system designed from the ground up in an ultra-compact housing, allowing use of backup iron sights and magnifiers. The 1x MicroPrism is part of the SLx optics line. SLx optics built Primary Arms reputation for innovation, reliability, and value. All SLx optics undergo rigorous field-testing during development to best serve you in any environment. IP67 Waterproof Fully Nitrogen Purged Dust Proof Fog Resistant Aluminum Alloy Main Body with Hard Coat Anodizing Now 13 Settings; 3 Night Vision settings (NV1, NV2, NV3); highest settings are DAYLIGHT BRIGHT. AUTOLIVE Motion Sensing Feature Increases Battery Life. Etched Reticle, Perfect Answer For Astigmatism and Works Without Illumination. 8 Mounting Height Options From 1.1in to 2.075in including Absolute Co-Witness and Lower 1/3rd Options.