The Remington 870s trigger guard is plastic
There are various degrees of plastic and trigger guards are typically of the toughest nylon/polymer type that is actually better than cheap pot metal
black knight said:You might want to check the trigger group for the Mossberg 590. I believe the 500 trigger guard is plastic and the 590 is parkerized steel. The two are interchangeable if I remember correctly from the Mossberg Armorers course.