https://www.amazon.com/Gogoku-12-Gauge-Cartridge-Boresighter-Batteries/dp/B07S52R9SY/ref=sr\_1\_10?crid=1JNSUH8KXMCC3&dchild=1&keywords=laser+training+cartridge+9mm&qid=1600102961&sprefix=laser+tr%2Caps%2C192&sr=8-10