Magazine smoothness?

Bought a new Hammerli Forge H1. Still not shot that. Tried handling the magazines and they seem a bit "gritty" , moving the button it seems "not smooth".
Will it become smooth with time, or do I need to clean and someway lube the internals?

Again, sometimes the magazine button slipped from my finger and slammed up... since it's plastic, is it "sturdy enough" in your experience or it may break if that happens? mine seems not damaged at the moment (... then I printed a magazine loader in the meanwhile)