Bolt Face Container
thingiverse
A locking container that uses a Cap that looks vaguely like an AR-15 bolt face. Uses a spring from Epee fencing: https://www.amazon.com/Radical-Fencing-French-weight-springs/dp/B0184BP2X6/ref=sr_1_2?crid=3LFN8LLISWFGP But it could probably use other springs that fit roughly 5mm diameter, 12mm uncompressed 5mm compressed
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