Fortis Manufacturing, Inc., Switch, Handguard, Black, Fits DPMS High Profile 308, 15.75", Matte WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov Material: Aircraft Grade 6061-T6 Aluminum / Locking handle: 7075-T6 Aluminum Internal Diameter: 1.34" Open venting at 12 o'clock position MLOK at the 3, 6, & 9 o'clock AND off-set location Hard-coat Anodized 4140 heat treated barrel nut (1-7/16 X 16 T.P.I.) Clamp torque setting 20 in. lbs. Spanner wrench needed to torque barrel nut to spec (not included) Made in the USA! Product Description The Fortis SWITCH series is an extremely lightweight, yet robust free float rail system designed for the AR platform. When designing the SWITCH, Fortis wanted a handguard that was easy to install, but also be able to quickly change rails for a variety of mission or competition specific setups. The rail features a brand new patent pending locking mechanism that allows tool-less removal of the rail.