Machined steel globe front with interchangeable inserts. Knurled bezel locks aperture in place. Fits standard dovetail bases. Accepts Anschutz inserts. Quick-detach locking thumbscrew retains sight on base. Click here to find a base. Mfg: Lyman SPECS: Steel, blue, matte finish. .550" (13.9mm) from bottom of dovetail to center of aperture. 1 1/4" (3.1cm) long, .750" (19mm) diameter. Includes – five disc inserts with .126" (3.2mm), .154" (3.9mm), .161 (4.1mm), .169" (4.3mm), .177" (4.5mm) apertures;
