Marble’s Upright Improved Tang Peep Sight Short Range Upright Blued

Upright posts for a Marble’s Improved Tang Peep Sight are interchangeable and of different heights to correspond with different shooting range distances. The approximate effective maximum distance for each upright post is as follows: Short Range: 0-100 Yards (1.619″ to 1.924″ height adjustment range; 0.5″ aperture disc with .055″ peep). Standard: 30-250 Yards (1.856″ to 2.352″ height adjustment range; 0.5″ aperture disc with .055″ peep). Mid Rang: up to 500 Yards (2.347″ to 3.364″ height adjustment range; 0.5″ aperture disc with .055″ peep).