Battle Weapon

Battle Weapon is the thirteen episode of Gundam Build Fighters.

Synopsis
The World Tournament enters its third period, which consists of one-on-one battles using only the original weapons prepared by the tournament organizers. Nobody will know what the weapons are until the battle begins. Although confused by the unfamiliar weapons, the top fighters win their battles, one after another. Sei and Reiji's opponent is the Thai representative Luang Dallara, a top champion of the tournament.