The Brownells RMS Cut Slide for GlockA(R) 48 enables you to install a Shield Sights RMS red dot sight on your slim line GlockA(R). It offers all the benefits of our "Front Cut" slide for GlockA(R) 48 including forward slide serrations that give you extra leverage in manipulating G48 slide against its stiff recoil spring. The cutout on top of the slide behind the ejection port accepts a Shield Sights RMS or other red dot that fits the RMS mounting footprint. We include two correct-length screws for securely anchoring the RMS to your GlockA(R) 48's new slide. The RMS Cut Slide for GlockA(R) 48 also comes with a factory rear sight dovetail and Mfg: Brownells