Here is an update from GHK:  In 2011 March, GHK will release the GHK GKM GBB, cooperated with LCT produced external part and GHK's brand new internal structure design.
Reference website including photo and film can be found at:

http://www.ghkairsoft.com

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When interested the Distributor contact: ghk@ghkairsoft.com

Best regards,
Mini
GHK Airsoft Inc.