So, is the the VFC Colt M4A1 RIS II Forging Gas Blowback Rifle the most realistic GBB rifle? Fully licensed from Colt, this has a heavy barrel, CNC'd realistic bolt carrier, and most of the metal parts are made of steel. The receiver has Mil-Spec hard anodised surface as far as we know so let's watch this Airsoftology video to confirm it: