New Captain America

After escaping from Faustus with the help of the Falcon and Sharon Carter, Bucky is captured by S.H.I.E.L.D. who take him to Stark's Helicarrier. Bucky promptly escapes and after a brief battle with Tony Stark, is given a letter from Steve Rogers asking Stark to watch over Bucky, and the mantle of Captain America should continue. Bucky agrees to relinquish his grudge against Stark and to become the new Captain America, but only if Stark uses S.H.I.E.L.D.'s technology to guarantee that no one can ever control him again and also to conduct himself with complete autonomy. As this arrangement is illegal under the Superhuman Registration Act, Stark keeps his support of the new Captain America secret. As Captain America, he wears a new costume and carries a gun which he uses on his first mission to kneecap A.I.M. agents and later against both Crossbones and Sin.