Update from Airsoft GI. Marq sends in news that the GHK G5 GBB is now available at their online store, how to get good deals with their coupon deal which will end today, and their regular livecast that will happen today and this might about the opening of GI Tactical and other topics... "The GHK G5 is now available at Airsoft GI! It is a gas blow back system and is only available in limited quantities. Extra magazines will soon be available.