The NcSTAR VMRUPCCMD Ruger PC Carbine Barrel RMR Mount significantly improves your shooting setup by offering a stable base for micro dot optics. Simplifying the installation process, this multipurpose mount takes the place of your factory rear sight base, allowing for precise positioning of RMR(R) and similar optics. Experience co-witnessing capabilities with your iron sights for unmatched accuracy. Compatible with RMR(R) optics and FlipDot series. Replaces factory rear sight base for easy installation. Allows co-witnessing with iron sights. Overall length of 3.1 inches for a compact fit. Bolts directly to barrel rear sight base. This essential accessory will take your Ruger(R) PC Carbine(R) to the next level.