When a violent police gang bursts into your house in violation of the 2nd Amendment it is your duty to react either by means of escape to fight another day on your own terms or to stand your ground and resist.
No law gives any gang the authority to confiscate your weapons.
No law gives any gang the authority to search your home for said weapons.
Your home is your castle, when that sovereignty is violated there is no more lawful authority to uphold or protect.
War is war.