JOHANNESBURG, South Africa (AP) _ The lawyer for a white extremist accused of killing black leader Chris Hani effectively admitted his client's guilt today.

Eben Jordaan, lawyer for Janusz Walus, had been expected to argue that a pistol identified by ballistics tests as the murder weapon had been planted in Walus's car.

But in his final argument before Judge Frikkie Eloff, he said: ''The ballistic evidence presents insurmountable difficulties for me to ask for an acquittal.''

Walus did not take the stand.

Jordaan told reporters after today's hearing that he had effectively acknowledged his client's guilt.

Police arrested Walus minutes after Hani, leader of the Communist Party and a top African National Congress official, was gunned down in his driveway April 10. The murder weapon was found in the car Walus was driving.

In earlier testimony, Walus' girlfriend had described the Polish-born suspect as a fierce anti-communist who feared activists like Hani would destroy the white paradise he found when he immigrated in 1981. Maria Ras said Walus was a member of the neo-Nazi Afrikaner Resistance Movement.

Walus, Gaye Derby-Lewis and her husband, Clive Derby-Lewis, a prominent Conservative Party politician, are all charged with murder, conspiracy to commit murder and illegal weapons possession.

Clive Derby-Lewis is accused of supplying Walus with the murder weapon, and his wife is accused of drawing up a hit list that included Hani, ANC leader Nelson Mandela and Communist Party leader Joe Slovo.

Hani's death came as the ANC and the governing National Party were making progress on plans for South Africa's first multiracial elections, which the black-led ANC is expected to win.