APS M4 Blowback AEG The M4 blowback edition AEG by APS is a relatively new edition to the airsoft world. Using a unique mechbox design, normal operation produces a small recoil effect to simulate the use of a real firearm. With a 16 inch barrel and multi-position telescoping stock, this rifle is perfect for medium distance outdoors play. The upper receiver, lower receiver, barrel assembly, buffer tube, and magazine are all a very sturdy aluminum alloy with the rest of the parts being either fiberglass or plastic. The lower receiver features the Accuracy Pneumatics logo and the custom molded stock has a rubber butt pad for added comfort. The included high capacity magazine holds 300 rounds and there are plenty of replacements available! The battery compartment is located inside the handguard of the rifle and is very easy to access. Simply pinch down the delta ring and remove the lower handguard half. Note: Does not include battery or charger