June 11, 2021: For about a decade the U.S. Marine Corps and U.S. Army have been seeking caseless ammunition or polymer (instead of brass) cased ammunition that would work reliably in combat and be ...
This article was updated May 25, 2023. It was originally published Nov. 17, 2009. To put hard, durable threaded holes in plastics, engineers often specify threaded metal inserts that will securely ...
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