I got a ASG AUG A2 a couple days ago. Ayed around with it and now it's time for me to dig in and learn the upgrade aspects. With that being said I want to start off with a tight bore inner barrel and a spring. If I get a tight bore inner barrel do I need a new outer barrel as well? My guns barrel is 509mm would a 510mm be fine if I toss on a flash hinder or something to replace the orange tip? Could you link me to exactly what barrel I should be looking at. As far as the spring goes. I want to shoot 350+ what spring should I be looking for? Can I just swap out the spring and be good to go? Or would a new spring break something?