honetly Ive found that a stock bar-10 will shoot a little further than most aegs accurately with some heavier ammo say .28, once you get the hop up adusted right. Theres not too much you can mod on a bar-10 "lightly" usually the goal is to increase fps wich means a heavier spring, and for the gun to take the heavier spring you will most likely have to upgrade your sears, piston, and spring guide to.