um scirion.. TM = Japanese. CA = Chinese. They both asian guns. There are no US mfg's of airsoft guns. (There were... but they got sued outta existence a few years ago). If they claim they are... they are just repackaging cheap chinese airsoft guns. (ie. Tippmann, Crosman, = UTG, CYMA, Etc). There are arisoft shops that sell custom guns under their own name, but they are all based upaon TM, CA, Star, etc.
Yes AEX seems to be more expensive then other retailers, but they also stand behind their products unlike other smaller retailers, They do things like sponsor alot of Airsoft Community event's... They also have 5 retail stores which is a nice alternative to only buying online based on price alone. You can actually go into any 1 of these locations and test fire to your hearts content b4 buying. They are ultra honest and actually know their shit about upgtrading and repairing decent quality airsoft. They've talked me outta buying stuff I don't need to buy on many occasions.