Brand New ! Glock OEM Factory Adjustable Rear sight Fits All Glock Models Gen 1-4
This Glock Rear sight is interchangeable with all Glock ModelsFactory Sight Adjustment Height
9mm Luger, 40 S&W, 357 Sig, 380 ACP is 6.5mm (.256")
45 ACP, 10mm is 6.9mm (.27")
A change in sight height by one increment, for example from .256 to .27, will result in a shift of approximately 2" (higher) at 25 yards, given no change to the front sight