An interesting video from Gunfire as they test the durability of materials used in airsoft guns... "What if YOU accidentally throw your replica’s receiver under a hydraulic press?! It could happen to anyone! In today’s episode, we’re testing whether airsoft receivers can withstand 1200 kg of pressure! We're crushing polymer, aluminum alloy, and steel – we're betting they don’t stand a chance, but maybe luck will surprise us?"

A video demonstrating the durability and stability of the King Arms Hop-Up Units. The units tested are the 60 degree and 40 degree and subjected submersion in Liquid Gas which was at 25ºC. Then this was followed by a stability test showing that the units can perform as marketed.