Pardon my ignorance, did you build these with 3D printer?
No. These are billet aluminum. I have printed guns before though. https://video.nostr.build/cc71b7bfdc73a633bb523539f78e060154eb22c77cda37beffc59906de211de7.mp4 https://video.nostr.build/6329b8e41319779d140991cf80010af0b3d8b21192a59c7b69a6a105777755b5.mp4
Amazing stuff!