this is a simple gun for 5mm peg holes, v2 and v3 print marvelous. if you have any suggestions please comment!
v2 and v3 have a lot more details, v3 has longer barrel than v2.
update - v4 and v5 uploaded.
If you like transformers I invite you to check out the website i write and photograph for
They are written in polish, but you can always enjoy the photos.