Leaders of the Ulster Defence Association have confirmed that it has decommissioned all weapons under its control.
Northern Ireland's largest loyalist paramilitary group put the remainder of its arsenal out of use in recent weeks.
The paramilitary organisation, responsible for some of the bloodiest atrocities during the conflict, had already put a small number of guns beyond use last June.
The act was facilitated by the Independent International Commission on Decommissioning under the leadership of General John De Chastelain.
The disarmament was verified by two independent witnesses - former Church of Ireland primate Lord (Robin) Eames and former top civil servant and chair of the Ulster Bank Sir George Quigley.
The announcement was made at the Stormont Hotel in Belfast by the UDA's political representative, the Ulster Political Research Group (UPRG).
UPRG leader Frankie Gallagher said: "The leadership of the Ulster Defence Association can confirm that all weaponry under its control has been put verifiably beyond use.
"This historic decision has been taken as a result of unprecedented consultation of all Brigade areas throughout the British Isles."
Mr Gallagher said he wanted to pay tribute to former UDA members who had died or been imprisoned during the Troubles.
He added: "To all those in the community who have lost loved ones, we understand and we share in your sense of loss but we are determined and are willing to play our full part in ensuring that tragedy of the last 40 years will never happen again."
