This is a good review by Mach Sakai compares two pistols that were used by the U.S. Marine Corps. The first one is the Tokyo Marui MEU GBB Pistol and the second one is the new Tokyo Marui M45A1 CQB GBB Pistol. The latter is said to have improvements over the older Marui .45 GBB pistols but is it enough for you to get it rather than tried and tested TM MEU?