The lawyer representing Richard Henry Bain has filed an appeal.
Bain was sentenced last month for second-degree murder and attempted murder in connection with the 2012 shooting outside the Metropolis club.
That's where the Parti Quebecois was celebating its election victory.
Among other things, Allan Guttman says his client only fired once.
Bain automatically received a life sentence after being convicted of murder.
Nearly a month ago, a Quebec Superior Court Justice set Bain’s parole eligibility at 20 years.
Guttman argued Bain should be eligible for parole after 10 years.
A stagehand was killed, another was injured.