NcSTAR VISM Lio Scope-4X34mm with Nav Led Lights/QR Mount Blue Illuminated Mil-Dot Reticle with Five Brightness Settings. 1 1/2" Scope Centerline height Electronic Control Panel for Blue Reticle Illumination and NAV LED Light: On/Off and LED Light Modes Auto Locking Quick Release Mount, fits Weaver/ Picatinny/ MIL-STD 1913 type rails Back-Up Iron Sights on top of the scope.