This is the correct mounting solution for shooters who want to install Leupold-footprint optics on their Glock MOS-equipped pistols.
The Glock Modular Optics System (MOS) uses interchangeable adapter plates to accommodate different red dot and reflex sight footprints. This Size 4 plate is the correct choice if your optic uses the Leupold mounting pattern. The adapter ensures your sight sits at the proper height and maintains zero when removed and reinstalled.
Simply slide the plate into the MOS slot on your Glock's slide—no gunsmithing or special tools required. This modular approach lets you swap optics or move them between compatible Glock pistols with ease.