The JP Enterprises JPGS-5D is a minimized small bore design intended to mount underneath many hand guard models on the market. This model features a click-adjustable detent system for precise adjustments and secure retention of your gas screw. Never lose you gas setting or screw. FeaturesClick-adjustable detent system for repeatable setup and secure retention of gas settingSix clicks per rotation of gas screw for finer adjustmentsEasy to access side gas adjustmentInternally retained detent components means no lost parts