No alternative at all, if you're a purist:
-Wrong colour trigger
-Wrong colour receiver pins
-Crappy trades
-Wrong colour gas parts
-Wrong mag catch
-Wrong colour mag catch
-Consumable Blowback
-Damagable gears
-Unique gearbox internals
-Custom Battery
-Bad finish
I mean, the STAR *which I own* has a few unique parts and a weird battery, but the only production problem seems to be the motors. This version, on the other hand, broke the blowback bolt and shredded the gears (proprietary, not standard version 2/3, so good luck finding parts in stock) within 1000 rounds. It also has a proprietary tappet plate and cylinder head.
I dunno about the specs, either. 80 m/s with .2's? 8.4 volt 18,000 ah battery?
http://www.guay2.com/F04.html
At least there's some movies.
http://www.guay2.com/SHOW4.html