This is the first numbered release in the Super Robot Lifeform Transformers Prime toyline, which is commonly referred to as "Arms Micron" in the USA. This is the Japanese release of the voyager Optimus Prime mold and instead of a weapon, it includes a transforming Arms Micron model kit with stickers and must be assembled.
AM-01 is the designated number for this release and the Arms Micron is named O.P. He sure looks like a tiny Shockwave though, doesn't he? There are plenty of plastic color and paint application differences between this and the USA standard release.
This release includes a sticker sheet and less paint apps for owner customization.
Comes new in sealed box.