This is the factory optic-ready pistol, which is compatible with the Shield RMSc optic. It also has a rail on the dustcover to accept a small weapon light. NOTE: if you’d like to mount a different optic than the RMSc to this pistol, such as an RMR CC or a Holosun 407/507K, you’ll need the appropriate C&H Precision Weapon Systems (CHPWS) adapter plate, which are available to purchase under Optics, Sights and Mounts. If you’d like to upgrade the sights on this pistol, or add upgrade parts or a trigger job, please contact us after purchase. You can also add extra magazines to your order. We offer this pistol at a lower price if it’s purchased to go into one of our custom build (ex: Duty/Signature Series) packages.