You trying hard to get all airguns banned or what?
I don't approve.
The moment there's ignition it's an illegal firearm. Free to do that in private but keep the forums free from this stuff.
This may sound offensive but you're not even doing it properly, to be honest...
I can mod an airgun/paintball gun to shoot at 600x what it's supposed to shoot but I don't show how to do it nor I keep my guns modded at home, as I don't want to get busted nor I want to scare people...
Seriously man, it's already so hard to even get an airgun where I live. The moment the snowflakes piss their pants off is the moment we get bans hitting us hard.
I really understand that it's fun to have it blasting but refrain yourself from sharing such fun with people who can even harm themselves while trying to emulate you.