Davide Pedersoli S.R.L RIFLE ADJUSTABLE HADLEY-STYLE EYEPIECE PEEP BLACK USA 463

Rotating, detent-locking disc in the eyepiece lets you select one of eight aperture sizes to match your sight setting to current lighting conditions for optimum accuracy. Change settings with a flick of your thumb; no cumbersome disassembly or loosening and tightening of the eyepiece. Soft rubber ring minimizes pain from accidental contact with eyepiece on recoil. Fits both Universal and Soule-type Creedmoor sights.