hello everyone im alittle new to this forum and airsofting not much but jsut alittle. I want to learn how to customize my own guns, i dont know where to start. i took one of my old spare guns that still worked and took it apart and put it back together no problem. so i did it all again except i did somthing wrong this time ( idont know what) , but it screwed up on me didnt bother me to much thow. I still want to learn how to still so if anyone can help me that would be great. also i can do externals alright but still learning some stuff.