Marble Arms Short Range Upright for Marble's Improved T Sight

This is a Short Range Upright Stem for the Marble's New Improved Peep Tang Sight Base. This upright stem comes with one aperture, 1/2" .055 diameter hole. The distance for the Short Range Upright Stem is approximately 0-250 yards. This stem is interchangeable with the Standard Range Upright Stem with approximate distance of 200-500 yards (#Mar990110), the Mid Range Upright Stem with approximate distance of 450-750 yards (#Mar990120), and the Long Range Upright Stem with approximate distance of 700-1000 yards (#Mar990130). (Some guns can not use the Shortest Upright Stem because it does not clear the receiver to the lowest possible upright.) The distances will vary do to the caliber, barrel length, make and model of your rifle.Not for use with standard base, must be mounted on an improved base.