Tritium night sight set from Rival Arms for Glock 17 MOS and Glock 19 MOS pistols. Front sight features a green tritium vial with a white outline for clean daylight contrast; rear is a green tritium U-notch. Designed to co-witness under a mounted red-dot optic. Specs: Pistol fit: Glock 17 MOS, Glock 19 MOS Front: Green tritium with white outline Rear: Green tritium U-notch Height: Co-witness (suppressor / optic height) Body: Stainless steel Includes front and rear set Co-witness sights sit higher than stock Glock irons so they remain visible through the lower third of a red-dot window - useful as a backup if your optic fails. The white outline gives a sharper daylight picture than the orange variant; pick this set if you train primarily in well-lit conditions or under range lights. Installation requires a sight pusher for the rear; front uses a Glock front-sight tool. Verify your pistol is the MOS variant before ordering. DISCLAIMER: "GLOCK" is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. and GLOCK Ges.m.b.H. Neither 3CR Tactical nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or GLOCK Ges.m.b.H. The use of "GLOCK" on this page is merely to advertise the sale of GLOCK pistols, parts, or components. For additional genuine GLOCK, Inc. and GLOCK Ges.m.b.H products and parts visit www.glock.com.