I picked up a new ruger mini 14 last night, it’s one I’ve wanted for a long time but wasn’t in stock many places here. I did notice however that on the new models the black upper part with the “ports” is plastic. Am I dreaming or did that used to be metal with actual gas port holes. My brother had an old model one and I remember actual holes and I thought I remembered it flaming every once in awhile. Am I just dreaming?