The primary reason that they make monkey metal or poor-metal quality guns is IIRC to prevent the firing of a real steel round in an airsoft gun. Apperantly they had problems where some unsavoury types attempted to convert an airsoft gun to fire (albeit only one shot) real steel rounds since it's hard to obtain a real firearm in Japan.
As far as KJ goes, I am almost polar opposite to Rumpel: I've bought my KJ, and I'm never going back.
While, yes I am not a true fan of FMU guns (especially considering that my TM P226 still works wonderfully on propane and has had no serious flaws other than it needs a new loading nozzle), considering it outweighs the problems that have crept up on my other KJ...
My existing gun has had a full valve blowout (which needed to be fully wrenched from the gun so that the magazine could be ejected, and this was on a cold day), two leaking fill valves, three leaking firing valves, two broken hammers, piss poor gas consumption (I still cannot get the gun to fire through an entire magazine whenever it is colder than room temperature) and the shoddy mess that is their pot-metal frames/slides. And all of this when it was properly lubed.
I'm sticking to my TM's. They work. They work quite well. It's not that TM is cheap; they produce their guns to the standards set up by ASGK. When KJ goes and cleans up their act, I may think about buying one.
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