VISM Ruger PC Carbine RMR Footprint and Rear Sight Mount Black. Allowing the micro dot to co-witnessing with the iron sights. This Micro dot base is compatible with NcSTAR FlipDot optic series SPD Solar Micro dot and any other optics with an RMR footprint base.This micro dot base mounts bolts directly to the barrel rear sight base and the factory windage and elevation iron rear sight bolts onto the rear of the mount. Specifications for VISM Ruger PC Carbine RMR Footprint and Rear Sight Mount: Manufacturer: VISM Color: Black Finish: Anodized Gun Make: Ruger Gun Model: Ruger PC Carbine Gun Type: Rifle Red Dot Sights-Footprint: RMR Length: 3.1 in Width: 0.83 in Height: 0.48 in Weight: 0.9 oz Features of VISM Ruger PC Carbine RMR Footprint and Rear Sight Mount Micro dot base mount and rear sight base accessory for the Ruger PC Carbine. Base mount replaces the factory rear sight base and allows the mounting of NcSTAR and other micro dot optics as low as possible to the barrel. Allowing the micro dot to co-witnessing with the iron sights. This Micro dot base is compatible with NcSTAR FlipDot optic series SPD Solar Micro dot and any other optics with an RMR footprint base. This micro dot base mounts bolts directly to the barrel rear sight base and the factory windage and elevation iron rear sight bolts onto the rear of the mount. Package Contents: VISM Ruger PC Carbine RMR Footprint and Rear Sight Mount VISM VMRUPCCMD: Ruger PC Carbine RMR Footprint and Rear Sight Mount Black