If you are looking for a squad automatic weapon (SAW) the ECHO1 M249 may be the best answer for you. It features a full metal construction and a detailed finish that makes you feel like you are holding the real thing. In addition to the 2400 round box magazine the ECHO1 M249 has the ability to use standard M4 M16 magazines so you have the ability to share magazines with the rest of your squad. The folding metal bi pod and skeletal stock with shoulder rest make this SAW ready to lay down a base of fire. The 2400 round box uses 2 AA Batteries(not included). Features: * MKII Full Stock * 3000 Round Box magazine * Accepts M4 M16 Style Magazines * Metal spring guide * Folding metal bi pod * Redesigned gear box * New hop up chamber design * 8mm bearing gear box * Realistic Pull Down * Receiver Top with Picatinny Weaver Rail * Inner Barrel Length: 509mm * Barrel Caliber: 6mm * BB Capacity: 300Rounds 2500Box Mag * Initial BB Speed: 370fps * Battery Type: Large * Package Includes: Battery Charger Manual Box Magazine High Capacity Magazine and Cleaning Rod. All Airsoft replica BB guns include a safety orange muzzle tip in accordance with Federal law. Any attempt to remove the orange tip is a violation of Federal law. Modified Airsoft Guns will not be accepted for return or exchange. Airsoft Gun BB Warning You must use .20 gram or higher AEG Quality Airsoft BB s with this Airsoft Gun. Using .12gram re used low quality low grade translucent or BBs purchased from large discount stores or major retail sporting good chains will void the warranty on your Airsoft Gun. High quality bb s meant for your AEG will enhance your playing experience and save you money in repairs down the road. Zephyr Sports Airsoft Battery Disclaimer: Zephyr Sports is not responsible for batteries that have been damaged as a result of improper operation storage misuse or abuse accident or neglect such as physical damage resulting from misuse contact with liquid water rain extreme humidity or heavy perspiration sand dirt or the like extreme heat or food use of the battery for commercial purposes or subjecting the battery to abnormal usage conditions or other acts which are not the fault of Zephyr Sports. Make sure you understand how your battery should be used and how long it should be charged. We recommend that you always use a smart charger to avoid damaging your airsoft batteries. If you have any doubt regarding the operation charging or storage of your battery and or charger please contact us. A charging battery should not be left unattended and should be picked up periodically while charging to check for overheating. Do not charge batteries near flammable material.