Police searched the Adelaide house of Chad Vinzelberg, 37, on Monday after they were made aware of the man's comments on social media.
They allegedly discovered a replica pistol, which was loaded with a single bullet, two flick knives, an extendable baton under Vinzelberg's bed, and a medieval mace and a crossbow in his shed.
Vinzelberg was charged with four counts of possessing prohibited weapons and one count of possessing prescribed equipment. He was not charged in relation to the alleged online comment.
