Anyone got any proof of issues?
People slag them off, like most things in Paintball, without having 1st hand experience.
The oil is just oil, same as most people will use on their markers, can't see how it will damage anything.
If you're lazy, and don't clean your marker after use I could see it causing problems maybe somehow...
Other than that what they gonna do?
Seriously?
You don't even really need to oil them, I think it's just a precaution. They fire through fine without it.
Prove, then slag off, that's the general order