SPECS: Steel and aluminum, parkerized gray and anodized black finishes respectively. Front Sight - Approximately 1.35" (3.4cm) long, 1.6" (4.1cm) wide, 1.6" (4.1cm) high when up, .73" (18.5cm) high when down. Rear Sight - 2.3" (5.8cm) long, 1.8" (4.6cm) wide, 1.4" (3.6cm) high when up, .82" (21cm) high when down. .150" (3.8mm) sight aperture.