From the Mobile Suit Gundam: Iron-Blooded Orphans series comes the HG 1/144 Gundam Marchosias!
A phantom machine thought to have been lost during the Calamity War. Marchosias' greatest feature is the four binders equipped on its back and waist. All of these function as sub-arms, and are said to have been designed to deal with any battle with non-humanoid MAs.
The bastard mace is Marchosias' main weapon, and the sheath itself has weight, allowing it to be used as a mace.
The four binders on the back and waist store the sub-arms and daggers.
The arm armor is useful as a striking weapon, and can be used as a claw by flipping it over.

Accessories:
1 x Bastard Mace
4 x Daggers 
1 x Shield
2 x Knuckle Guards
1 x Foil Sticker

Material: Plastic (ABS, PVC, polystyrene)

Vehicle type: Mobile suit