Elevate your Colt 1911 to modern standards with these high-performance optics plates, engineered for seamless mounting of red dot sights. Shield RMSc/Holosun 507k Footprint Plate: Supports Shield RMSc and Holosun 507k series optics (e.g., Holosun 507k X2), providing a compact, low-profile solution ideal for concealed carry setups, with an integrated Glock dovetail rear sight cut for enhanced sight alignment.