380 ACP empty magazine insert

Magazine insert for [.380 ACP](https://en.wikipedia.org/wiki/.380_ACP) for use with a laser training cartridge. Depresses the follower to avoid activating empty-magazine hold open. Rack the slide with an empty magazine inserted! Designed and tested with LCP II, but should work in any 380.

.380 ACP is also known as 9x17, 9mm Kurz, 9mm Corto, and 9mm Browning Court.

Inspired by the [9mm version by ErieQuiet](https://www.thingiverse.com/thing:4661392)