Police in Darwin arrested a man on Saturday in connection with the theft of weapons from a navy patrol boat.
A dozen semi-automatic pistols and two pump-action shotguns were stolen from the armoury of HMAS Bathurst at midnight (CST) on Thursday, while it was moored.
A duty sailor on board was overpowered during the robbery and tied up.
AAP reports police surrounded a unit in Darwin city about 2.30pm (CST) on Saturday.
Commander Richard Bryson said all 14 weapons were recovered. However they were still investigating what the man's involvement in the robbery was.
"Police need to establish whether this person received the weapons or if he is one of the principal offenders,'' he said.
"It would appear a number of people have conspired."
AAP reports no charges have yet been laid and investigations are continuing.