Hand-built, precision aperture with eleven iris settings (.022" to .125" dia.) to ensure excellent sight focus and contrast in all light conditions. Click-adjustable settings are spring-loaded for a positive stop that holds tight under rapid fire. Iris adjustments do not move bullet point-of-impact. Mounts to standard A2 rear sight.
SPECS: Steel, black, matte finish. Rubber eyepiece. 1¼” (3.2cm) long x 1½” (3.8cm) diameter.
Catalog page 55