https://us.glock.com/en/discontinued-models

Looks like they put out a statement on why there doing this.

Why is GLOCK discontinuing so many models?

In order to focus on the products that will drive future innovation and growth, we are making a strategic decision to reduce our current commercial portfolio. This streamlined approach allows us to concentrate on continuing to deliver the highest-quality and most relevant solutions for the market.

What does this mean for me as a customer?

You’ll still have access to the most popular GLOCK models you know and love—just with a more focused selection.

Will discontinued models still be supported?

Yes! Just like we do with previous generations. We will continue to service discontinued models.

Do these portfolio changes affect law enforcement agencies?

GLOCK remains fully committed to supporting the varying needs of our law enforcement partners. While IOP programs may be affected, GLOCK is prepared to work closely with LE partners to make sure officer and agency needs are met. For more questions, contact your LE District Manager.