When i set it to single it shoots automatic. The pinion gear is a bit worn from when I messed around with it, but i just wanted to make sure it wasn’t a problem with the gear box. If anyone can help could you tell me where i can buy a part to fix my problem and how to fix it? Thank you! Oh and by the way I have a Jing Gong M4-F model AEG. 380 fps mmhmmm. Also is there an easy way to up the fps and/or accuracy? Thanks!