Split Glock 22 model. I added pinholes to use small pieces of filament as alignment pins. Print both sides flat (no supports needed), add the pins, then test fit it to make sure your alignment pins aren't too long. Once you are good to go, glue it up with your favorite glue. Superglue works fine. A few clamps helps it stay tight while drying. Don't get carried away with the glue, but if you use too much and it squeezes out, just trim if with a razor blade once it's dry.
If you use these for training, they might get abused, so print with 4 walls to keep the trigger guard solid. I didn't add any provisions for weights to keep the print simple, so a heavy infill will make it a bit heavier.
The author remixed this model.
Split in half, added pinholes for alignment pins.