NSW Police are concerned gangs are getting their violent and deadly work done by teenagers.

9News can show the weapons that have been seized in a recent crackdown by authorities working to disarm these children.

A musket handgun with a bayonet was allegedly found down the pants of a Western Sydney teenager.

Detective Inspector Guy Magee from NSW Police said it was “extremely alarming”.

“It’s alarming for my staff, alarming for members of the public,” he said.

Among a collection of dangerous items frequently carried by youths prior to being intercepted by the police are knuckle dusters, axes, and knives of nearly every conceivable design and size.

One of them was pulled from a boy’s underpants at Bankstown train station.

They’re all part of a police blitz targeting youths and weapons and their worrying link to the underworld war.

Since Christmas, Sydney has experienced 12 shootings and numerous cars set ablaze, resulting in the tragic deaths of two innocent individuals and another woman being left in a coma after being shot.

There’s confirmation the troops on the ground, more often than not, are children.

When viewed as a business, crime sees juveniles as almost ideal workers. They are low-cost, eager to gain favor with those in charge, and when apprehended, they are often back on the streets and active again swiftly.

But what’s more shocking is that to win the attention and contracts of organised criminal networks teen crooks are fighting amongst themselves.

The Mount Druitt Kmart brawl two months ago is an example of this sick game to win favour.

“My message to those who want to be armed in Western Sydney, they need to understand when they do that they are increasing their chances exponentially of ending up in a police cell or a hospital bed,” Magee said.