9.2 Overall length - 6061 T6 Extrusion - Type III Class 2 Hard Anodized and Bead Blasted Finish - Same slot spacing to take any Magpul MOE rail accessory on the 45 degree slots. - 10-32 holes on top rail to mount Sling Studs and future accessories. - Included anti-rotational QD hole - Includes Barrel Nut Screws and Includes Optional Shims for spacing - Installation Instructions Included - Made in USA with Domestically Sourced Materials - 1.52 OD - 1.35 ID (Will not fit most suppressors and KX3.)