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Guys from WikiWep tested the lower AR-15 rifle receiver printed form Objet ABS-like material. it failed after six rounds.From video description:
Test firing a printed (ABS-like Objet photopolymer) AR receiver in 5.7x28FN. Lower max PSI than .223, but broke the buffer tube ring within six rounds. We do not recommend printing a lower receiver for a rifle setup until the file can be further reinforced.
More information on:
http://defdist.tumblr.com/post/37023487585/printed-reinforced-ar-lower-review
