GHK PDW Adjustable hop up kits
 

http://img23.imageshack.us/img23/688...pgradekits.jpg

Kits including
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Barrel base

Upgrade bolt: Increase muzzle velocity to 120m/s( around 395fps) Condition: 20degree Celsius /0.2g bb/12KG green gas

Hop up rubber: Anti frozen, air tight, not easy deform. Compatible for all A.E.G and GHK GBB system

Barrel stabilizer: Prevent barrel from loosen

Is there a Canadian retailer that even sells GHK PDW's? Cause I really want one, I have a WE PDW (open bolt gen 3), and I absolutely hate it, got to play two nights with it, then the nozzle jammed and snapped in two. The reason was that the cool down dried the o-rings until they wouldn't move, and apparently lubing the bolt between games wasn't enough. The long and the short of it is that I want a GHK PDW.