This unique pen consists of 1 single piece taking advantage of all AM possibilities, it is not a print in place assembly of parts, yet it is fully functional with multiple springs , click and release mechanism.
It can Only be made by AM with no supports technology such as plastic powder bed MJF or SLS.
all you need to make it fully functional is slide in a ballpen refill cartridge ( amazon ASIN: B0BVZN4PS4 )
The author marked this model as their own original creation.