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Polymer 80% Lower vs. 3D Printed Lower | Destructive Testing

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I use the push up test to break a couple AR-15 lower receivers, we inspect the results.
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https://www.youtube.com/watch?v=F_Wj9T78T9g



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Just finished the Scorpion Alloy by DB firearms & AWCY?. Metal reinforced upper design is built like a tank, DB’s kit was on point. Printed in Polymaker pa6-cf on an X1C.