LOL, put on a holographic sticker + laser etching of trademarks, and the gun instantly cost U$50 more. You can go into the semantics of how this is a legit Masada and all... but it's just that, semantics for money. It's a bit like buying organic eggs.
The 300FPS version is the HK/Japan version, 400FPS is the export version.
IF the body is the same as the Masadas of the old, the upper receiver is aluminium, the stock and lower receiver is ABS. Remains to be seen whether the new stock can actually absorb load or it'll just give way when with a 1-point sling.
Expect a G&P Masada version soon - basically a Masada running a G&P Gearbox.