Officers received information about the manufacturing of methylamphetamine at a unit in Lidcombe yesterday.
Police searched the Uhrig Road unit, where they found two glass cooking containers containing liquid believed to be methylamphetamine, about 7pm.
“Specialist police from the Drug and Firearms Squad’s Chemical Operations Unit attended to assist in dismantling the scene,” NSW Police said in a statement.
Police said more items for making and using methylamphetamine were also found.
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“During a subsequent search of an allocated storage area, police located a double-barrel shotgun, ammunition and an air pistol.”
Police said the items were being forensically examined and they had not made any arrests.
Investigators are urging anyone with information to contact Crime Stoppers on 1800 333 000.