The Vickers Elite Glock Sight is a fiber optic replacement front sight for Glock 9/.40 S&W/.357 Sig models. The Vickers Elite Glock Sight set requires the use of a 0.245 tall front sight for all caliber Glock pistols except for .45 ACP and 10mm which will typically require the 0.230 front sight. Sights may require minor fitting and may not be returned after installation. These front sights are taller than factory Glock and not compatible with standard factory rear sights without adjusting the sight height. Front Sight Height: 0.245. Front Sight Width: 0.125.