Beachmaster, I have, among the lowers I've puttered through, a couple of poly ar lowers. A cavarms and another- forget the name. The whole complete lower with poly hammer, trigger, lower and such was about $100 back when parts and lowers were really high. I haven't beaten any of them to death. Low round counts but so far they still are intact. I bought them just as a lark. But for the wife I'd go with something I had more confidence in, like aluminum.