The three, who appeared on Tuesday, would be back in court on July 23, Captain Paul Ramaloko said.
Emma Shumler-Tishko, 62, her husband Mark, 59, and Endi Nkhoma, 26, have been charged with possession of unlicensed firearms and ammunition, dealing in dagga, and contravention of the Explosives Act.
Wheelchair-bound Emma Shumler-Tishko was out on bail of R5000 because of her condition, while Mark Shumler-Tishko and Nkhoma were kept in custody.
The Ukranian couple and Nkhoma were arrested at the couple’s house in Norwood, north of Johannesburg, on May 22.
Police found R1, R4, R5, and AK-47 rifles, and about 300 handguns at the house.
Detonators, a machine used to manufacture ammunition, packaged dagga, and explosives used for ATM bombings were also confiscated.
During a previous court appearance, prosecutor Talita Louw told the court that some of the firearms in the cache were handed to police for destruction during a national firearms amnesty in 2009.
The firearms were suspected to have been sold by corrupt police officers, Louw said.