Polymer outside, but steel lips that securely lock onto the 92 magazine well. I loved this product, it's much heavier duty than stock mag plates and will help you mags drop out of your gun faster. Does not include mag spring plate. Only downside, if you put this on thr newer 17 Rd 92A1 9mm beretta magazines, you will not get a flush fit. There will be a 5mm gap between the mag plate and three grip of you gun. Worth the 5$ in my opinion, gonna buy a 15 round inox mag just for this player cause I like it so much lol !
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