What you would expect from GHK.
High quality product with great resistant to cool down/cold weather.
It shoots 420 FPS OOTB, so you'll need a 1J nozzle from Samoon, apart from that, great gun, just not for everyone.
GHK is also releasing a SIG 553 in the near future.
https://www.youtube.com/watch?v=ren4wbqEn6I