I started this project before I bought my 3D printer. This is inspired by the wooden blow back action 1911 by parabellum1262 on Youtube.( https://www.youtube.com/watch?v=lDZn1BRxCr0) I downloaded his plans but never got around to building one of my own.
I have seen other users who have recreated this gun by printing the components and assembling it with glue and pins. After seeing several videos of "Print-In-Place" objects I got the idea that this could be printed all in one piece.
After many hours of modeling in Fusion 360, and eight 20h prototype prints, I present to you the Print-In-Place Rubber Band Gun 1911. Print it at a 75 degree angle as seen in the picture. When done printing just remove the supports. The hammer has tighter tolerances than all of the other joints to provide the necessary friction to keep it in an uprite position so you will have to separate it from the lower receiver with a putty knife. No glue, no pins, no hassle.