I've only owned one gun from ARES. My TAR-21.
I love the external quality of the gun, it's beautiful and durable.
The internals are OK. The stock gun had a fairly significant air leak in the nozzle. Otherwise, the gun was fine out of the box. The biggest issue is when you try to replace broken parts. I had a broken tappet plate, spring guide and gearbox shell. I did manage to source the parts from ZshotUSA, but it was very difficult and expensive. I wish the gearbox was made of some steel or other material, because the zinc alloy is weak.
Proprietary parts is the big turn off.
Would I recommend ARES? Yes, if you don't plan on upgrading. But if you're like me and you like to upgrade and tinker, I would suggest otherwise.
World record in propane sniffing.
-Tokyo Marui M4 MWS GBBR
-ICS CXP M4
-KJW KP07 (1911 MEU)