Optimus Primal transforms into a gorilla, sporting black fur in beast mode. He transforms by rotating his lower body, resulting in visible robot parts like folded shoulder cannons and leg sections during this mode. Beast mode articulation is limited: shoulders have restricted movement, elbows and knees bend, hips are ball-jointed, while wrists, waist, and head lack joints.

In robot mode, he stands roughly 5 inches tall. His head sculpt lacks a faceplate, featuring lips instead, and bears an Autobot insignia on the left shoulder. Articulation includes a ball-jointed head, shoulders with improved range over beast mode, elbow joints, a waist joint, ball-jointed hips, and bendable knees. His color scheme blends dark tones with blue accents.

Accessories include two swords matching the original toy's colors. These can be wielded separately or combined using a small connector piece. He also includes a transparent blue and silver missile launcher, mountable via an arm connector. The engineering replicates the original Beast Wars Ultra-class figure at a reduced scale, retaining design elements like visible weapon ports and robot-part integration in beast mode.