Mach Sakai reviews the latest in the Tokyo Marui Hi-Capa Series, the 5.1 Direct Optics Ready (DOR) Gas Blowback Pistol. As its name indicates, it is ready to be mounted with an optic that can be fit on its mount and it works best with the Tokyo Marui Micro Sight. Good for CQB games and for airsoft practical shooters looking for a GBB pistol that is ready to take in optics.