The One-Punch Armor Arc is the 61st story arc covered in the Ranma ½ manga, spanning one chapter. This arc was included in volume 23 of the Weekly Shōnen Sunday tankōbon and volume 21 of the Viz Media tankōbon.
Desperate to defeat Ranma, Gosunkugi purchases a suit from a magazine ad which claims to be able to defeat anyone with a single punch. After agreeing a location, Ranma and Gosunkugi face against each other. Unfortunately Gosunkugi is unable to land the fight-winning punch on Ranma, resulting in his new suit exploding.
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- No major events occurred in this arc.