Gentaro Toi is back for another review for Hyperdouraku, covering the G&G TR16 SBR 308 MK2 AEG... "The TR16 SBR 308 MK2 is a G & G original design electric gun that is modernized based on the .308 caliber AR10 series, which is more powerful than the .223 caliber used for the M4 carbine and has high accuracy at medium distances. The AR system has been redesigned with the same operability.