Stuck on Act I, Chapter 2 - Very Hard Difficulty

[codename76]

This is on Train when you being pursed and attack by a dozen gyrocopters.

I tried different strategies but the sheer number helicopters was overwhelming. And lack of any real cover made it hard not to get heavily damaged.

I tried to leash the copters hoping I could take them out fast enough. Also tried going to back of the train and trying to take some cover. But the enemies damage you there.

Any tips on passing this.