Adjustable Aperture Eyepiece For Popular Target Sights
Precision sight receiver discs with 10, click-adjustable iris settings (.022" to .125" dia.) let shooters match peep sight aperture to light conditions. Internal spring eliminates face wobble. Fits most Redfield, Lyman and Williams receiver sights. Others fit Browning factory and Montana Vintage Armory tang sights.
Big Book Catalog, Issue:66, Page:282
New Product Supplement, Issue:513, Page:000
SPECS: Steel. 3⁄4" (19mm) dia. x 1⁄4" (6.3mm) thick disc. No. 3LS - 7⁄32" (5.6mm) - 40 thread on 5⁄16" (7.9mm) lg. shank. Browning 1885 - 10-32 thread shank fits Browning factory tang sights. Master Disc - Features 1-1⁄2" (3.8cm) dia. flexible, neoprene light shield and a steel cup that completely shades the opening.