Dry Fire Barrel Blocker

Printed https://www.thingiverse.com/thing:4705289 in PLA. Please see the original design for usage instructions.

Fit great, but while attempting to take it out, the threaded section snapped off in the casing section. I also scaled one up to make a .45 version. It also fit well but ended up breaking at the threads too. PETG might be the way to go with https://www.thingiverse.com/nickbertoldo/designs original design. I've had not so good luck printing PETG on my machine.

I used Tinkercad to remove the threaded section to print as one piece in TPU.
The flex allows it to fit into the barrel without needed to thread two parts together.
One model for 9mm another for 45 ACP. May update with other calibers.
5/21/22:
Added 380 with a primer cutout. Added files for the 9 and 45 with primer cutout.

And a reminder:
1:Treat every firearm as if it is loaded.
2: Never point the muzzle of a firearm at anything you are not willing to destroy.
3: Keep your finger off the trigger un