The file 'WE Glock Thread Adapter BEST 3D Printer Model' is (stl) file type, size is 235.3KB.
This was printed on my elegoo mars. I tried other adapters but they had incorrect threads. This is exact threads needed. I have not tested on FDM,so please let me know how that works. This also allows the inner barrel to flow through the adapter.
WeGlockAdapter_v1.stl | 674.9KB |