2 turret? how?

Hi, I see in game 1 guy he put 2 turret how is possible, I try to put 2 turret and I can`t, can someone explain?

Thank you!:handsdown:

Brought 1 for GP and 1 for NX i guess

Hi
In which mode? If in quarantinemode so you can buy mutagen and you will have 2 turrets.
In elimination 2 turrets arent possible.

he can close now, ty