Saber takes 2 worlds and combines them into one rail. This Rail is slotted for trigger adjustment ease, 80% is Arca Swiss rail for tripod use and other Arca accessories. the last 20% is picatinny rail. This is the sturdiest rail on the market, made from the highest quality materials and coating.The rails are very solid and has hardly any flex. Underneath there’s a threaded hole for a camera tripod adapter. The Arca Swiss is a 3 in 1. Camera tripod, Arca and Picatinny.