Another custom gun on offer from Airsoft GI that is combination of M4 with HK sights and topped off with a Noveske sound hog..."[The] Airsoft GI Flame Hog is KWA M4 Based  with  YHM Rail with end cap, Madbull One Piece Barrel, Remove-able front and rear sight, Madbull Flash hider Magpul CTR Stock, Battery Box.  Please note: Scope, Flashlight are not included."