Really good upgrade platform
This is the full metal version, even the stock tube. Grip and stock has quality feel to it, no cheep plastic. Inner barel runs through all of the silencer, but it is posible to open silecer in the front and drop in a tracer if you change inner barel. Well under one joule with mounted spring. Hop up chamber did not work well with my magazines, and it seems to be of low quality. Replaced it with a cheap one and then it worked fine. Really good platform to start with and do upgrades on.