M4 airsoft stock pipe washer

This is a reconstruction of the washer that keeps the crane stock pipe of an M4 airsoft rifle attached to the receiver. I broke the original trying to tighten up a rickety stock pipe. The original was made from a cheap, brittle metal alloy that cracked without warning. Standard 5 mm opening for the screw through the centre, with a small cutaway to allow the battery leads to pass through. Printed in PLA at 100 % infill. Tested on an M4A1 replica. A tight fit, but so far it does the job. I may put