GHK has been a leader in the gas blowback rifle industry since 2008, specializing in AK style replicas. With a reputation for high-quality and reliability, GHK has become one of the most trusted manufacturers in the industry.
Was leaking out of the box, needed a little teflon tape on the pierce valve thread and a new silicon O-ring on the output valve and now it works perfectly. Not a lot of shots per filling though.