Axcel LANDSLYDE Carbon Pro Slider Sight AVX-41 Scope Ranger DBL Pin .019 Black FirePin equipped-CNC-machined pins resist bending and breaking;AVX-41 (41mm) Scope;Strong TCS Connector instead of a 10-32 rod;Visible In-Line Sight Level;CoPlanar Centering Technology-Aiming ring at same depth as sight pins