The 侍ノ弐 Sengoku Astray Gundam (戦国アストレイ頑駄無 Sengoku Asutorei Gandamu) is a Gunpla that appears in the anime Gundam Build Fighters. Based on the MBF-P02 Gundam Astray Red Frame it is built and controlled by Nils Nielsen.

Based on the MBF-P02 Gundam Astray Red Frame that appeared in the Gundam SEED Astray series, this Gunpla is built by Nils Nielsen and embodies his love of his Japanese heritage. Aesthetically, it greatly resembles a samurai, with an enlarged V-fin that is modeled after the Crest-horn and additional facial scrupling that is modeled after a men. The Red Frame's original faceplate is hidden underneath this extra plating and can be revealed if the extra plate is destroyed. Armed with two swords and a shield, the Sengoku Astray is also uparmored, with the new shoulder armor containing a pair of hidden arms and thrusters at the back. With its swords, the Sengoku Astray can not only launch shock waves, but also cut through beam attacks and particle barrier. The Gunpla has a special melee attack, the ‘Particle Fa Jin', that allows it to destroy an opponent from within.