Both went to the rear of The Warehouse about 11pm on May 28 last year and confronted five staff members who had gathered in the administration area. Anderson armed himself with a screwdriver and a pair of scissors and Cameron had a cut-down .22 calibre rifle.
Two staff members were threatened and led to a toilet area, ordered to face the wall and had their hands bound with an electrical cord. Shortly after, three other employees entered the office and were also taken to the toilet and bound.
Cameron demanded the shift manager lead him to the safe and, once it was opened, all the cash and jewellery was placed into a bag. Cash and cheques stolen were worth $27,612. The total retail value of the roughly 300 items of jewellery was $242,805.
Cameron told the court he had been awake for three days due to consuming methamphetamine at the time of the offending.
"You had been smoking meth for a period of three to four months prior to your arrest after trying the drug to 'understand the lifestyle' you say but that you could not stop," Justice Gerard Van Bohemen said at sentencing.
"You say that you want to change so that you can show your little cousins there is an alternative to becoming a criminal."
In 2012, Cameron was jailed for four years and two months for an aggravated robbery and received his first strike warning.