Home-grown railgun rifle, partially built on a 3D-printer, shoots projectiles at 250+ m/sec. Nice. (Engadget): https://t.co/f1KOzEa1ZE
— Steven Ashley (@steveashleyplus) October 20, 2015
from Twitter https://twitter.com/deabigt
October 20, 2015 at 07:38AM
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