I recently stumbled upon an interesting product called the Striker Control Device from a company called Tau Development Group. The SCD (Striker Control Device) is a device that replaces your Glock’s slide cover plate and adds another layer of safety when holstering your Glock.
As you holster your Glock you press on the SCD with your thumb, the SCD then blocks the rearward motion of the striker, that blocks the movement the trigger bar which prevents the trigger from moving and the pistol from firing. I know, keep your finger off the trigger if you don’t want the gun to fire. The SCD isn’t a replacement for safe gun handling, it’s just another way to ensure safe holstering. You don’t want something like this happening to you. One downside is the SCD backplate moves as you fire the Glock (see the video I posted below to check it out in action), this can be a bit distracting if you’re looking at it. Probably not any more distracting than The Punisher or Molon Labe backplate I’m sure you already added to your Glock.
Edit: after I wrote this I realized we actually gave a sneak peek of this device a few years back, but it was called the “Gadget” back then.