This is an injection-plastic kit of a science-fiction/anime item.
Adjusted from Kotobukiya's website:
This model's design has similarities to the Alpha unit, and the main visual difference is the legs. The Beta unit was outfitted with support devices on the legs for increased mobility, giving the unit an extremely high movement speed. The reason for this improvement is the slow movement speed of the Alpha unit, which was sacrificed at the sacrifice of the unit's extremely heavy but durable armor. Like the Alpha unit, the Beta unit has the Iron Fist operators that increase strength, but the flexibility of the wrist articulation have been improved, allowing the users to be equipped with a higher variety of weapons. This feature allows the model to be customized with tons of different weapons, from long-range cannons to melee gear, but most customizations utilize some smaller weapons such as machine guns and knives in order to avoid hindering the unit's improved mobility.
The cockpit can be opened and closed, which allows a separately sold Governor unit to be placed inside. Due to the construction of the model, some parts may require removal for certain Governors to fit. The newly redesigned wrist frames use a universal joint that possesses a wider range of movement than the Bulkarm Alpha model, and allows the model to wield the Slugger Blade as a duel weapon. The hover units on the model's ankles can be removed and adjusted using included parts for use as a hovercraft for Governors. The fans and rudders on the hover units are also articulated. The base of the Slugger Blade is can be posed, allowing the weapon to be folded up and mounted on the model with the included attachment. Although the model shares some designs from Bulkarm Alpha, the head, front chest armor, and additional armor for the legs are entirely new. The kit also includes the part to create two optional Bulkarm Alpha heads.