Cox, of West Launceston, pleaded guilty to having possessed a prohibited import, two firearms charges, two counts of unlawful possession of property and three minor drugs charges.

Magistrate Simon Brown further remanded Cox in custody, and will sentence him on Monday at 4pm.

Police prosecutor Brett Steele told the court that police searched Cox's Neika Avenue house in October last year and seized two glass smoking pipes, six new patio gas heaters still in boxes, a knuckleduster stun gun and three firearms, including one which had a scope.

The firearms had been buried in a garden bed, inside Sunbeam FoodSaver bags, including two rifles which had been stolen from a Pipers River burglary in May 2013, Mr Steele said.

Cox told police he had bought the knuckleduster stun gun online and had been storing the gas heaters for an unnamed man.

Mr Steele also told the court that police searched a Bridgenorth property in May this year, where Cox had been staying.

Police recovered five firearms from the property, including three which were loaded, a stolen $10,000 Husaberg motorcycle, a stolen $10,000 Grizzly quad bike and a stolen $39,000 Ducati motorcycle.

Mr Steele said four of the five firearms had had serial numbers removed, while the fifth was believed to have been stolen from a burglary in May 2013.

Defence solicitor Adrian Hall told the court that his client was a heavy user of methamphetamine, had not stolen the items in his possession and lacked significant convictions.