Canik Pistol Optic Sight Lid Screws, M3. Manufactured by Canik, these optic sight lid screws are designed for select Canik METE and TP9 models using an M3 optic lid interface. This set of screws is designed to retain an optics sight or mount to the optics-ready pistol slide. This genuine set comes with two screws and two washers and is perfect to keep on the workbench as a spare.