They are similar to the original Beast Wars T-Rex Megatron's. The white objects under his fists are the tongfa weapons. It bears some similarities to the original Matrix of Leadership, and might be used against the new form of Unicron in this series. It is actually a Transmetal 2 spark crystal installed backwards. The grill pattern inside his chest resembles Optimus Prime's.
Eyes are of a golden color.
The antennae can be lowered, or raised up when his chest slides up to cover his head during transformation to mammoth mode. My scans of his transformation instructions can be found here . Break Break is a young brass Cybertron warrior with a penguin mode. With the others, he developed the plan to surprise their incoming commander with a trap for him, but Big Convoy tricked them. Break also has a cannon mode that can be held up like a Targetmaster by larger Cybertrons like Longrack and Big Convoy.