Single Pin Clarity With Simple AdjustmentBuilt with a 1.8 in ID aperture this sight uses a bright single 0.19 in vertical pin for a clean aiming point. Micro adjustable windage helps deliver precise adjustment while the design works for both left and right handed users. A glow ring illuminates the fixed level and the fixed bracket includes 3 mounting positions. 1.8 in ID aperture Bright single 0.19 in vertical pin Micro adjustable windage adjustment Adjustable for left and right handed users Fixed bracket with 3 mounting positions