Body cam shows moment police dog handler Jesse Swain wrestling with ice addict who snatched his gun

Extraordinary body-cam footage shows a police officer wrestling for his life with an ice addict who snatched his gun from his holster.

Footage has emerged of cops swooping on wanted man Benjamin Patricks, hiding in scaffolding in the inner Sydney suburb of Chippendale, last year.

NSW Police dog handler Jesse Swain confronted Patricks - who grabbed the officer's gun from his holster and put his hand on the trigger. 

With his own life and those of his colleagues on the line, Swain frantically wrestles with Patricks to stop him from firing the gun.

NSW Police dog handler Jesse Swain stopped an armed ice addict from firing a gun at him and him and his colleagues

Dramatic footage obtained by Nine News shows Swain ordering Patricks to 'let go' six times.

'Drop the f***** gun,' he shouts.

Patricks can be heard screaming as Swain begs his colleagues: 'Please help me guys.'

'We will, we will, we will,' his colleague assure him.

Swain held onto Patricks as he directed the weapon away from himself and his colleagues.

Patricks is eventually hit with a police radio and surrenders. 

'I'm sorry, officer, if I hurt you,' he's heard crying. 

Police body cam captured the officer Jesse Swain wrestling with the armed offender

The life-threatening ordeal was over within 30 seconds. Swain walked away with only a gash to the head. 

Dramatic police body cam from the incident emerged from the first time after Patricks was sentenced to four years jail in Sydney's Downing Centre Court on Thursday. 

Swain attended court for the sentencing. The video was first obtained by Nine News reporter Tiff Genders.