Oh, and keep in mind bricking is one of the least efficient things for a decker to do in combat. It's sad
The action economy to hack a gun to death is terrible. First you have to spend a complex action to find the gun's matrix icon. Then spend action(s) achieving marks on it. THEN you can try to hack/brick it. Three passes in. By that time the sammie's already killed the guy.
Oh and keep in mind that if the gun's owner realizes at any time the hacker is focusing on his gun, it's just a free action to turn the wireless off. Decker can't touch it unless he's physically touching it.
This is mostly true, when you're up against professionals with their PANs running silent, who are trained to recognize and respond to hacker attacks. Against a typical goon who's not running silent and has wireless active, you automatically spot the weapon's icon within 100m (p.234), and you don't need any marks first to hit it with a Data Spike (p.239). Just reach out and brick it.
The modern Matrix depends on the fact that everything manufactured for the last decade, from commlinks to toasters to smartguns to teddy bears, has its own wireless transceiver, processor, and bottomless memory. It all meshes together to create the fabric of the Matrix. Essentially, devices generate the Matrix the way living beings generate Astral Space.
You can turn off wireless functionality temporarily, but most people can't be bothered. They
want their stuff wirelessly talking to each other, integrated into their PAN. They
want their commlink visible online, able to interact with other commlinks and hosts. Turning it off won't be the first instinct for an average Joe. It's not as if they run afoul of hackers every day. Most people probably never will.
If you want to sever something from the Matrix completely, you have to make it a "throwback" (p.421).