How can I get permission from my parents to play M-rated games?

I am a 13-year-old, mature, straight-A student with a craving for M games, a craving which my parents won't let me satisfy. Literally ALL my friends have them except me. I have the money I need to buy them and a giftcard to buy them myself online. I dont even want games like Grand Theft Auto. I just want Call Of Duty-type games. All I need is there permission. Please help!!How can I get permission from my parents to play M-rated games?
Your parents are right. Call of Duty is a terrible series. They're saving you from experiencing mediocrity. They believe you are not mature enough to handle the violence present, and that's their decision as parents. And I believe them about you.
Well GTA has more that violence in it so it might be kinda hard to convince them to buy you that. But Call of Duty games are just shooting and stuff so they are not bad just show them some gameplay and stuff. I suggest not buying Black Ops because if you don't have experience with COD games you will get destroyed online. I suggest you get a game that is about to come out like Bulletstorm or Homefront.How can I get permission from my parents to play M-rated games?
show them gameplay of a game of milder violence on youtube or something and tell them that most of the games are like that. I suggest assassins creed and just show someone free running.How can I get permission from my parents to play M-rated games?
if they believe that u r not matrue enough then show them that u r mature enough to play Call of Duty, but don't expect them to let u play Grand Theft Auto