Similar to the short 2.5″ Diamondhead Rails, these 6.25” accessory rail segments fit Diamondhead’s V-RS Modular Drop-In Handguard platform or the V-RS Free-Float forend to allow unlimited accessory attachment. The removable rails are machined in Mil. Std. 1913 Picatinny rail dimensions from tough Mil. Spec. Type III anodized 6061 T6 aluminum. Hex head mounting screws are included – made in the U.S.A. by Diamondhead.