New weapon crate system?

Hi~

With the last event I won some crates, and I won an M4A1 for 1 week.
So to earn money I shoot with M4A1, but after long shooting, it shows a screen telling me that I have to repair it, but I cancel. But I don't see the text "Need to repair" or "Decreased while moving", so my question is: "Is this system new? That if you win with Black Market, the weapon never broke, only expires?"

Plz respond

Louis

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