Jim Shannon of the DUP broke down in tears in the chamber of Commons as he recalled the deaths of his cousin and friends who had served in the Ulster Defence Regiment (UDR).
The speech came as MPs criticised investigations into the actions of British veterans who served in Northern Ireland during the Troubles.
Shannon himself served in the UDR during the conflict.
"I understand very well the concept of closure and wanting justice," he said.
"I want justice for my cousin Kenneth Smith, who was murdered by the IRA."
Attempting to hold back tears, he continued: "I want justice for the four UDR men that the honourable member refers to, a few of whom I knew personally.
"And yet there's no multimillion pound investigation available for that.
"So I resent the idea that this seems to once more represent that one life is worth more than another.
"It's not, never will be."
He added: "The victory belongs to the right-thinking people of Northern Ireland, who despite having no reason to trust and nor to forgive, have chosen to support the rule of law and justice, and now are waiting for us to give them the support they deserve in these dark hours."