With Greece plunged into a financial crisis, Golden Dawn rose from a fringe group to win 18 of Parliament's 300 seats in 2012 elections, despite widespread accusations it organizes attacks on immigrants, political opponents and gays.
Now Greece's third most popular party, Golden Dawn denies it is neo-Nazi, although many prominent members have an affinity for Nazi symbols and slogans.
The crackdown on the party came after the death of 34-year-old Pavlos Fyssas, a rap musician who was stabbed as he left a cafe on the outskirts of Piraeus. A man arrested at the scene of the attack admitted to the stabbing and identified himself as being involved in Golden Dawn.
None of the six lawmakers have been charged with any involvement in Fyssas' death. Instead, they are expected to be charged with involvement in a criminal group and some also with public disturbance offenses.
The party has vehemently denied it had anything to do with Fyssas' stabbing.
"It is clear that the aim you all have is to politically disarm Golden Dawn. It is the aim of all of you to exclude Golden Dawn from elections," said Ilias Kassidiaris, the party spokesman and one of the six deputies who saw his immunity lifted. Greece is to hold local elections next year.
"We are the subject of a disgusting conspiracy, with illegal and unconstitutional arrests ordered by a government that is enslaved to foreign interests and is selling out the country," Kassidiaris said.
On Thursday, lawmakers are to debate draft legislation prompted by the Golden Dawn arrests that would allow Parliament to suspend state funding for political parties whose leadership, or a large number of whose deputies, are "involved in" criminal acts.
Interior Minister Yiannis Michelakis said late Wednesday that the proposed law would apply to cases of involvement in a criminal group as well as terrorism.
An investigation into Golden Dawn has led to police raids on party offices and the homes of some party members and supporters, as well as on those of police officers accused of turning a blind eye or helping with alleged illegal activity by the group.
More than 30 arrest warrants were issued, and the searches have uncovered homemade shields, knives, bats and some firearms.
In a statement Wednesday, police said that a search of a Greek businessman's home near Athens uncovered about 30 registered firearms, a collection of knives, three dozen laser sights for firearms, an anti-tank shell and Nazi memorabilia. The search was carried out following allegations that the businessman, who is wanted by Greek authorities on unrelated charges, may have been providing weapons to Golden Dawn.
The party issued a statement denying any link with the businessman, who has not been named in accordance with Greek privacy laws.