Besides the lack of air tanks

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If you intend to do martial arts or absorb a lot of impact with the gauntlets

Wings open and lock once fully extended

Version 2.4 Mechanical Wings hydraulic Besides the lack of airBionic Concepts Wings V2. 4 Durable complete aluminum chassis with wingtip lighting. Wingspan when open is 6. 5 feet. Width closed is 19 inches. Electric Version Weight 15 lbs, CO2 version 13 lbs. Takes 10 AA NiMH rechargeable batteries. Will open and close about a hundred times before batteries need to be recharged. Includes contoured backpack and two inch wide leather straps with adjustable snap on buckles. Includes contoured aluminum backpack plate