MDT’s Picatinny rails are designed to be a reliable addition to our chassis systems when installing various accessories on your bolt action rifle. They are machined from 6061-T6 aluminum, then hard-anodized black for a durable finish. These rails come in 3 different lengths and feature an integral QD flush cup sling mount on the 2 longer sizes. Screw spacing is 1.6” center to center (common with other reputable rail brands). 10/24 flat head screws in ⅜” and ⅝” length and 10/24 weld nuts for installation on AR15 style handguards included.