An image has surfaced on social media which shows Mir holding an AK-47 and standing casually next to an armed personnel.
Mir drew flak for act from several quarters. Putting his defence, he said that he was under threat and carried the weapon only for self defence.
He also said that he has done nothing wrong and that every child in Kashmir has grown seeing the guns.
"Children in Kashmir have grown watching this, so what's wrong in it?" Mir was quoted as saying in media reports.
The picture has surfaced just a few days before the Assembly polls in the State. The five-phase polling to elect the 87-member Assembly will be held between November 25 and December 20.
Earlier, National Conference leader Nasir Aslam Wani's son was seen brandishing a gun. His photo went viral on social networking sites.
Meanwhile, the Centre has decided to deploy over a large number of central paramilitary forces' personnel for ensuring free and fair elections in the valley.