The CALK PLT P211 GTO/P320 R1 PRO TO RMR from Calculated Kinetics is an optic plate designed for the Romeo 1 Pro Cut and RMR footprint, engineered to preserve the rear portion of the slide even after the optic cover is removed, and is compatible with SIG P211 GTO as well as Sig P320 configurations. This front-dovetail plate hooks under the slide and integrates recoil lugs to prevent left or right optic twisting, while delivering durable performance in a hard anodized black finish. The plate is crafted to fit Sig P211 and P320 models, specifically designed for RMR footprint optics, and is produced with precision to ensure reliable alignment and stability under recoil. Included hardware ensures straightforward installation, with a Torx bit, Vibratite, and an Install Card to assist proper securing of the optic, plus 6-40 screws to accommodate the platform. The CALK PLT P211 GTO/P320 R1 PRO TO RMR embodies the brands commitment to versatile, ready-to-run optic compatibility, delivering a robust mounting solution that maintains firearm integrity while offering a streamlined, secure platform for Trijicon RMR and similar optics on SIG pistols.