Installation of HiViz front sights on Glock pistols is made easy with the Glock tool. Simply remove the pistol's slide and push the factory sight out from its press-fit mount. Using the Glock tool and the screw supplied with the Glock sight, replacing the sight takes merely minutes. HiViz DISCLAIMER: "GLOCK" is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. or GLOCK Ges.mbH. Neither Galati International nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or GLOCK Ges.mbH. The use of "GLOCK" on this page is merely to advertise the sale of GLOCK pistols, parts, or components. For genuine GLOCK, Inc. and GLOCK Ges.mbH products and parts visit www.glock.com.