So yes I know there has been dual wielding threads since the beginning of Cradle. 99% are about wielding 2 weapons and sacrificing your shield.
Mine is a bit different.

Mine would introduce a new shop in which you can purchase conversion tickets. With these tickets you can convert certain 5* weapons into shields.
These shields would have damage/status resists similar to the ones they dealt as a weapon. The weapon Perks would be based more on the weapon you convert.

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Basically:

Slow weapons (BAB, GF, DA, Callahan) = grants bombs MSI or guns/swords ASI

Midspeed weapons (Brandish, Nitronome, Valiance = grants CTR

High speed weapons (Cutter, Flourish, Shard, Antigua) = grant damage

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Natural damage perks would transfer over too.

Something like the CIV or WHB would turn into shields that offered that monster bonus to swords but would also gain their other respective buff.
The Antigua lines would boost the monster buff to guns.
etc.

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Weapons Viable for Conversion:

Slow:
Magnus/Tundrus lines
BAB
Graviton/Electron vortex
Irontech
Troika and Sealed sword lines

Midspeed:
Blaster lines
Alchemer lines
Pulsar/Catalyzer lines
Haze Bombs
Nitronome
DBB
Brandish lines
Calibur lines
FOV

High speed:
Antigua lines
Autogun lines
Shard Bombs
Cutter lines
Flourish Lines
BTB

NOTE: Reskins, event items, DLC, promo box items cannot be converted

NOTE2: All items must be 5* to convert

NOTE3: When converting a weapon with UVs you will receive a unique ticket to take to Punch, he will apply 3 new UVs to the weapon. These new UVs will be of the same values but different Perks. Example: You convert your ASI VH Acheron into a shield..... Punch will then apply a new UV that is a Random VH UV. These tickets can only be used on the shield that was converted and nothing else.