Electro-mechanical gun lock by Zore.
<video controls autoplay loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/gun_lock_alarm.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
Previously:
https://www.homemadetools.net/forum/...079#post130028
https://www.homemadetools.net/forum/...872#post129277
https://www.homemadetools.net/forum/...026#post125427
