Here is the KTWRR is a mini spool with roughly 25m kevlar wire capacity, tension adjustable and so compact that you can fit 20 of them is a single pocket, great for deminiging, training or just setting up perimeter alarms on your campsite.
BOM:
M3 x 28mm L
M3 Hex Nut
3mm ID x 6mm OD O-Ring
If you are interested in other prop firearms, Airsoft parts and designs do join our group on Matrix:
https://app.element.io/?pk_vid=f12152aac29bbc4a166549437941781a#/room/#GCI-General:matrix.org
!!!Note: I'm always open for suggestion and help on improving the design and proof of concept.