They have shit internals, looks like Gen 1 JG stuff. Bodies have wrong markings, and scratch super easy. They also didn't do the necessary upgrades to it for the gun to handle 430+ fps, they just took a stock gearbox and shoved in a 430 spring so it's going to break something in there for sure.
But $350 for a bunch of Real PTS Magpul parts, metal body and a nice set of rails. Hell I'd buy that and just throw out the gearbox.
"Don't you know the first law of physics? Anything fun costs atleast $8"