Securely attach your rifle to an ARCA mount with the MDT M-LOK ARCA Rail. This handy 3.3 inch ARCA rail attaches to any rifle, handguard, or chassis with M-LOK slots. ARCA Swiss adapters have become the standard for attaching rifles (and cameras) to tripods, bipods and support gear. The MDT M-LOK ARCA Rail is Mil-spec Type III hard-black anodized. Available as a standard, flat profile that can adapt to most M-LOK compatible surfaces.