McClain's lawyer, Harvey Steinberg, is appealing the sentence, which was imposed by an Alabama judge.
"I'm aware of the bad publicity that I've given the Raiders," said McClain, who's practicing with the team while the appeal process unfolds. "After talking to Coach (Dennis) Allen, I have the support of the Raiders, my teammates, as well as the coaching staff. I apologize for the bad publicity that's been put out there.
"It is a legal process and I can't talk much about it, but I think in due time the Raiders and the Raiders fans that are out there will see it all come to an end. It is what it is; I can't really talk much about it, but it will be resolved in the near future."
The charges against McClain stemmed from a fight on Nov. 30 in Decatur, Ala., according to The Associated Press. The victim in the incident said the linebacker pointed a gun at his head and threatened to kill him before firing it next to his ear.
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