there are things WORSE than a plastic lower--and that is a plastic FCG--LOL
the poor lower that snapped in the photo has a plastic FCG to boot.
i don't want to come out like i am attacking plastics and polymers --i suspect they can be made to work for a moderate duty shooter they might be ok , provided that the proper plastics, and reinforcements are made.
and you have to consider the market itself , as lowers are coming back to "sane" pricing.
i can see people in various socialist states getting these --while their still legal--