RDO SCREWS: I'M HAVING TROUBLE WITH MY GLOCK OPTIC MOUNTING SCREWS:

On Slim Frame Glock models (43, 43X, 48) the Holosun 407 & 507K both require the user to insure the screw is fully inserted into the plunger channel (screw hole) prior to beginning the torque process.

Glock Screw Size: 4x40 – 3/8

Torque Spec: 15in/lbs.