A build based on the Walther P99 style pistol. This build requires custom rails. There are a handful of p99 licensed/knockoff versions that can work with this frame; hopefully we'll have a full list some day.
https://odysee.com/@TheGatalog-PrintableFramesReceivers:9/Project99:9
https://ctrlpew.com/file-drop-matthews-patent-project-99/