I got this as a loaner gun for a friend when they were getting into airsoft, and they have since purchased their own. 

Great gun, and is fitted with the GHK 12" carbine kit, and 300mm inner barrel.  It easily lifts .32's, and is fitted with a variable FPS nozzle, which is adjustable with an allen key.  I haven't touched it since setting up, and I'm getting 350 with .20's

It also comes with the M4 magpul style stock, and the original folding stock is included.  It has a QD suppressor with flash hider, fully functioning Strike red dot, metal charging handle, and four gen1 magazines.

The mags are gas tight, but suffer from the usual GHK feed lip issues.  I have reinforced all of them, and they currently feed fine.  I would recommend purchasing a new set, or better still get some gen2 mags as these do weigh over 500g per mag!  See the photo of mag feed lips FYI.

It is used and has wear to the bolt.  It runs as it should do, with no cracks in the receiver.  I am looking for £250 + shipping with everything included.