The Model kit can be interchanged into either Duel Blitz or regular Duel. 

Weapons/Other Gimmicks

Any of the weapons can be wielded by the hand parts.

The Beam Saber hilt(s) can be removed from either the opening panel on the left Assault Shroud Armor, or the regular Duel backpack, as handheld weapons.

The Beam Rifle on the Assault Shroud's right shoulder armor can be flipped out.

One or two of the shafts can be optionally removed from the Lancer Dart, as either individual display pieces or handheld weapons.

Piercer Lock's claw can be displayed in in either standby or discharged modes.

The Piercer Lock can also mount onto the stand. (https://gunpla.fandom.com/)