Making barrel rifling using steel bars

Using square HSS bar to make grooves rifling in a tube, passed 5 times for 20 groove, Fund my projects: https://buymeacoffee.com/pcpairgunschannel Note: This video is for educational and entertainment purposes only. Do not emulate or copy anything you see in this video. HSS bar 4mm: https://s.click.aliexpress.com/e/_oDX0aat Steel tube: https://s.click.aliexpress.com/e/_olmFAPj LATHE used in the video: MINI Lathe 7x16 800W (Europe and USA link): https://s.click.aliexpress.com/e/_DlYP5IH Asia link: https://s.click.aliexpress.com/e/_Dlt9SAt