Glock Fixed Rear Sight 6.1mm (.240&rdquo; height) Black Polymer with White Outline for all pistol models - Factory OEM Part # SP00154 Glock Factory OEM Fixed Rear Sight (Not for the G42 or G43) Height: 6.1mm (.240) Interchangeable - Fits all Glock Pistols excluding the new Slim-Line models G42 & G43 (does NOT fit the G42 or G43) (The 6.1mm sight comes standard on the G17L model) Glock Factory OEM (OEM Bulk Packaged). Manufactured to the same exacting standards as the original, guaranteeing excellent fit and reliable operation