Such things have been attempted more than enough times, with the results the same each time. It seems that you have your mind set on the idea that your petition or letter will be the saving grace for airsoft in Canada.
Do whatever you wish. I'm sure that the MP would love to waste his/her time and effort attempting to voice an opinion for change in something that he/she knows anything about that was submitted to him by someone who is not even old enough to vote.
"Its only a little bit on fire"