Product Description The Primary Arms SLx 3x21mm Micro Magnifier is a compact and capable magnification solution designed to pair seamlessly with your existing red dot sight. Built from durable aluminum with a matte black finish, this fully multi-coated optic delivers crisp, clear imagery at 3x magnification with a 21mm objective lens. An integrated diopter adjustment allows shooters to fine-tune focus for precise eye-to-optic compatibility, while the Picatinny-compatible mount enables fast and secure attachment to virtually any standard rail system. Whether you&';re engaging targets at distance or transitioning between CQB and longer-range shooting, the SLx Micro Magnifier enhances your capability without adding excessive bulk to your setup. Its waterproof construction and ergonomic design make it equally at home in the field or at the range. Product Highlights 3x Fixed Magnification with a 21mm objective lens for improved target identification and engagement at distance Fully Multi-Coated Optics provide maximum light transmission and clarity, even in low-light and twilight conditions Integrated Diopter Adjustment allows quick, tool-free focus customization for individual shooter eye relief and clarity Picatinny Mount Compatible for fast, secure attachment and removal on standard rifle rail systems Compact Aluminum Construction with a waterproof, matte black finish built to withstand demanding field conditions Specs Brand: PRIMARY ARMS OPTICS MPN: 510010 UPC: 818500015826 Magnification: 3x (Fixed) Objective Lens Diameter: 21mm Exit Pupil: 7.0mm Eye Relief: 1.9 in Field of View (Linear): 39.37 ft at 100 yds Optical Coating: Fully Multi-Coated Material: Aluminum Finish: Matte Black Mount Type: Picatinny Water Resistance: Waterproof Color: Black Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer. ]]>