Two-Gun Kid (1948-77)

The Two-Gun Kid is the name of two Western fictional characters in comic books published by Marvel Comics. The first, Clay Harder, was introduced in a 1948 comic from Marvel predecessor Timely Comics. The second, Matt Hawk a.k.a. Matthew J. Hawkins (retconned much later to Matt Liebowicz), was introduced in 1962 and has continued into the 2010s. The latter Kid is better known, thanks primarily to his connection with, and later full integration into, Marvel Comics' shared continuity, known as the Marvel Universe, but the Clay Harder Kid enjoyed a 14-year span in comics.

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Two-Gun Kid #103

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Lee - Whitney - Smiek "Bite the Desert Dust and Die!" more info