When the lights go out, your sidearm doesn t need to be left in the dark. TRITIUM PRO night sights transition from standard white dot sights during the daylight, to glowing green dots in the dark. Tritium does not need batteries and does not need to be charged with light it simply glows! Product Features CNC Machined Duty Proven Nitride Fortress Finish 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 Sportsmans Outdoor Superstore 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.