Lego Thompson M1A1 Shell Ejecting Blowback SMG

My Lego shell ejecting blowback Thompson M1A1. Link to mechanism video : This smg uses a very simple low friction mechanism which allows it to eject shells. I did want to build a proper extractor but it proved to complicated. I also built a select fire switch for this but it was very unreliable so I didn’t include it in this video. Anyway hopefully this is something new and it inspires more builds like this.Credit to Phant0m and Kevin183. Song :