The Mech Tech looks interesting as a potential "urban defense weapon." If the velocity is increased by 40% as advertised does it shoot fairly flat out to 50, 75 yards? How effective at 100 yards? What optical sight works best, what dot sight?
I don't have a CCU, but I will note that any velocity increase depends on the particular load selected. In the 16" Marlin Camp Carbine, .45ACP hardball isn't significantly faster than it is from a 5" pistol barrel. Clearly, the load is optimized for pistol use.
ALso, the 1911 frame that you insert into the CCU cannot have an extended thumb safety. The CCU will block it and make it impossible to put the piece on safe. A GI-style safety works fine.