Project Arms The Complete Series contains episodes 1-52 of the anime directed by Hajime Kamegaki and Hirotoshi Takaya.

Ryo Takatsuki, Hayato Shingu, Takeshi Tomoe - three boys, three accidents, three ARMS. Nanomachines designed to be the ultimate integrated weaponry, ARMS are insanely powerful...and, in inexperienced hands, often out of control. Now a powerful, secret organization is after the only living samples of this technology, and the strangely enhanced assassins who have been sent to get them are ready to kill anyone who gets in their way.