The Salmon River Solutions family of ARCA rails are not only the lightest ARCA rails on the market but also the only ARCA rails available that match well to a rounded style hunting stock. The Arca + pic enables someone to have a single rail to run a bipod and a tripod off. Made from 7075 aluminum, it is 4" OAL and has a bolt spacing of 1.5" to 3.0". These come with a sling stud hole. SRS designed these to be used at the fore end for shots at a decline where you utilize the tripod to support the gun instead of a bipod. You get 1.7" of ARCA rail and 2" of pic rail. Each rail comes with 10-32 screws and M-Lok mounting hardware, to provide compatibilty with a wide range of forends.