The Primary Arms SLx Micro Prism Anti-Reflection device eliminates excess scope glare and hides any glint that could give away your position. The SLx Micro Prism Anti-Reflection Device is extremely helpful in keeping your glass clean from dirt and debris that can scratch the lens. This anti-reflection device is made from anodized aluminum and is easily installed by screwing it into the objective lens. FeaturesOnly fits Primary Arms SLx Micro Prism scopeEliminates scope glare and glintProtects scope lens from dirt and debrisDurable anodized aluminum constructionEasy to install