#4 Merit Hunting Disc Adjustable Iris for Rear Sight -SS 5/16
#4 Merit Hunting Disc Adjustable Iris for Rear Sight The #4 is designed to replace the existing fixed aperture in your peep sight. Our adjustable aperture allows good sighting in any lighting condition. The overall size of the disc is smaller than our target models, allowing low mounting and reduced weight. The #4 easily fits most tang sights with its standard size 7/32-40 thread. Some special threads are available for unique sights (contact us for information). Click spring maintains aperture setting. Withstands any recoil. Aperture varies from .022 to .156 inches diameter. Threaded shanks available in three lengths. See size chart for proper length. Shank A Dimension 4 SS 5/16″ See Size Info Page