Special features include true scale and full accuracy, hi-tech double-layer gun shield with rivets, workable breech (shell insert is possible), both aluminum barrel and plastic barrels, two types of 3D designed muzzle brakes, two types of wheels, two tire patterns (new and worn out tread), four Heer gun crewmen, ammunition box (tube, wooden case, and metal case), brass ammo, and photo-etched parts for gun shield vision cover.