G&G GR16 A3 Full Stock Carbine AEG The GR16 A3 Full Stock Carbine by G&G Armament is a great metal body M4 for both the intermediate and advanced airsoft enthusiast. Manufactured out of Taiwan, these guns are a great alternative and better quality than similar models made in China. With the carbine barrel and adjustable stock, this rifle works best in CQB and medium distance engagements. The upper receiver, lower receiver, barrel assembly, carry handle, and magazine are all highly durable aluminum alloy and steel. The rest of the exterior parts as appropriate are a durable mixture of nylon, fiberglass, and plastic. The mechbox has been factory upgraded with zinc gears, 8mm bearings, high tension spring, and a 25000 rpm Hi-torque long axis motor. The lower receiver features an engraved G&G logo for easy identification. The rifle comes with the standard G&G high capacity 450 round magazine and there are plenty of other replacements available. The battery compartment is located inside the buttstock of the rifle and is fairly easy to install. It is accessed by opening the small door on the butt plate and then simply plug and play. Airsoft players recommend this as fun alternative to Classic Army AEGs. Note: Does not include battery or charger