Designed for use at close range, the Steiner 5101 T5Xi 1 - 5 x 24 Riflescope features a 30-millimeter tube diameter and an 11.3-inch tube length. The riflescope is calibrated for use with 5.56 rounds, while the 1x - 5x magnification provides eyes-open situational awareness and allows for engagement with distant targets.