YouTuber RCLifeon shows his creation, a 3D Printed Airsoft Gun... "In today's video I built a fully working 3D printed airsoft rifle! All the parts are printed in PLA and weathered with dirt and water for a more realistic appearance. It works by a big compressed spring pushing a modified bicycle pump to rush air through a barrel. It's powerful enough to shoot 50m (160ft) straight up in the air but not quite enough to penetrate an aluminium can. Best project ever!"