It's optics this time for Mister Moro to review in this Hyperdouraku review... "Nobel Arms' latest dot sight SURE HIT ARP2 is characterized by its square shape. Although it is a tube type, its angular square form also suits PDWs such as MP7 and P90, and submachine guns such as MPX and modernized MP5. A flip-up lens cap, high mount/low mount, and RMR conversion plate are also included. It can be loaded with anything from long objects to handguns (separately sold plate required).