HAO's G style Super Gas Block is a carbon steel perfectly machined gas block, which is later issued in the URGI upper program as a revised upgrade after the failure of the off-precision test.  
 
Made in Taiwan
BB type: 6mm 0.2g BBs
Power source: 11.1V PTW, AEG / 9KG green gas GBBR
Power: 90 m/s = 0.81J with 0.2g BBs
J / cm2:  2.835 J/cm2
Design and manufacture for Airsoft use. No live ammunition using function.