Gear Sector Rail Mount Hand Stop, Black The [ Patent Pending ] Gear Sector™ Rail Mount Hand Stop was designed to provide a low profile, ergonomic solution for increased weapon control. We designed them to fit perfectly flush with the Tango Down rail panels for an uninterrupted rail space. They can be mounted anywhere on a picatinny rail but work best when run in pairs. A bottom stop allows the weapon to be pulled into the shoulder pocket and a side mounted stop indexes perfectly in the web of your hand for proper placement behind a weapon mounted flashlight. Materials & Construction The Gear Sector™ Rail Mount Hand Stop is precision CNC machined from billet 6061-T6 aluminum and finished per Military Specification ( MIL-A-8625F ) Type III, Class II Hard Coat. Material: 6061-T6 Aluminum Finish: Military Specification ( MIL-A-8625F ) Type III, Class II Hard Coat Weight: 0.6 ozs. Compliance: 100% Berry Amendment Compliant Origin: Proudly Made in the USA Installation Installation is straight forward. Simply loosen the socket head cap screw. Remove the screw / clamp assembly. Apply a drop of Vibra-Tite® VC3™ ( included ) to the last few threads and allow to dry. Slide the mount onto your rail system, insert screw / clamp assembly and tighten it down with the included allen wrench.