Lifan brake question?

[ambassador]

I won't have my bike til' tomorrow or the next day but I have to ask, on the 06 GY-5 the front brake looks like they have a small cylinder, looks like a CO2 cartridge connected to the caliper housing.. Has anyone had an issue with this? It looks like it could be ripped right off during a trail ride in some brush or something? Is there a way to omit this or does it serve a specific purpose? I've never seen a disc brake setup like that and am just curious...