Diamondhead Short Rail Kit (3Pk) for V-RS Drop-In Handguard 2831 + Nimrod's Wares Microfiber Cloth Short Rail Kit (3 rails) for 7" V-RS Base Customize the V-RS for specific applications Mil. Std. 1913 Picatinny rail dimensions Fits all .223 variants Please note: Includes one Nimrod's Wares Microfiber cloth per order, regardless of quantity purchased.