Sig offers many model variations and optic cuts. Calculated Kinetics optic plates support the Romeo 1 Pro Cut, with the rear side remaining after the optic cover is removed. These plates also fit the SIG P211 GTO. Their plates for these models feature a front dovetail that hooks under the slide, recoil lugs to prevent the optic from twisting left or right, and are hard anodized black for durability. They even manufacture 6-40 screws for this platform to include with the plates.

Features:
Fits Sig P211 and P320
Designed for RMR Footprint Optics
Includes Hardware, Torx Bit, Vibratite, and an Install Card