First of all, I'd like to ask all posters to refrain from posting the legalities of this subject. I'm not located in the US; I'm an approved full auto collector in Finland, with legal possibilities to convert or build machine guns with an easy and straightforward licensing procedure. The question is, how, with a GSG5. I may have done some gunsmithing in my spare time but I'm by no means a professional and rather than trying to figure out a solution myself, I'd rather not re-invent the wheel. There seem to be a number of videos of FA GSG:s on YouTube but contacting the people who have built these guns isn't very easy. I've tried, without success. I'd prefer a select fire conversion, but a dedicated full auto conversion will be just fine as long as it operates from a closed bolt. Can anyone help or point me to right direction with this project? Any help is much appreciated.