Airsoft GI talks about G&G Full Metal GKS74 AEG that is powered with Lipo... "G&G is has consistently produced affordable and high end airsoft guns for the past decade and the G&G GKS74 is no different. The all metal AK is extremely solid and comes included with a 600 round high cap magazine along with 2x lipo batteries to keep you in the game longer. This variant comes with a side folding stock to minimize your profile while in CQB environment. Shooting at an FPS of 340-350 making it great for indoor or outdoor airsoft play."