The Mark 4 AR 30mm Integrated Mounting System (IMS) features a CNC-machined, one-piece aluminum base and ring design. It is made to fit any AR-style rifle with a standard Picatinny (MIL-STD-1913) rail and any scope with a 30mm diameter main tube. This IMS solves the common challenges of mounting a standard riflescope on an AR platform-specifically proper scope height and eye relief.