This is a 3rd party video which we found very useful

Overview of AF505

Don’t forget to put 1 drop of oil in the air intake every time you reload the magazine. ONLY 1 DROP

https://www.youtube.com/watch?v=EPxw_1QKKmg

Great Video by “The Honest Carpenter

https://www.youtube.com/watch?v=cqpIJCCxxnA