How to convince my parents to let my brother get an airsoft gun?

Question

My brother wants this: Boyi D-Boys M4 METAL Airsoft Gun Metal(the $130 from airsplat) but my parents won't let him get one. I tried giving them a bunch of pro-airsoft reasons,but they counter attacked each reason with with an anti-airsoft reason to not get it. It's like they came up with a list of anti-airsoft reasons(they probably did). My dad thinks that there is not enough space in my brother's room(it's really small, and I mean REALLY small). My mom just hates guns. I'm all out of ideas.

Answer 1

Here's a good idea: buy one and don't tell them.  See how long you can go without them knowing about it.  This is SURE to end well!

Answer 2

Convince them at airsoft gun point LOL