Thanks for the reply !
yeah i think for now can do with dual weapon sprite , like dual uzi / dual pistol etc
but overall, i think will be interesting for dual weapon usage
maybe can also served for gameplay purpose (e.g holding torch while shooting, or simply placeholder for animation that can quickly changed based on of what being equipped (like imagine equip powerup / buff to have more spread or higher fire rate etc like risk of rain) ( i think someone below also mention about powerup as suggestion)