I have quite a few concerns so far
If the gun breaks around 10 matches, how long would it take to repair the gun?
If the repair is only a few matches, what’s the point? You typically use different guns for different scenarios; even if you used the same gun multiple times, why can’t I just keep the gun?
If the repair is a long time, wouldn’t that just hurt new players with extremely limited gun selections and favor high ranks with copycat guns that all do nearly the same thing?
Will this system be a slippery slope to buying guns akin to CS:GO?
Would this system diverge into P2P to repair guns faster?
Would durability become the major factor in determining what gun to use (more than the gun’s stats)?
Will durability be used to make higher/lower ranked guns worse in order to glorify their respective counterparts?
Will durability become a game necessity for balance?
Is durability a ploy to get rid of one-tricks?
Will durability get its own stat bar?
These were just the few I could come up with off the top of my head