No it wouldn't. The length of the barrel has nothing to do with accuracy in paintball... don't believe me? Go grab a mini Phantom, stick it in a vice, cock and fire repeatedly and measure velocity. Then do the same with a full size Phantom. Provided that they're both consistent in FPS and at the same angle, they're going to fire the same distance with the same accuracy.
گرگ باش مثل من مثل ببر مثل جغد تو پرسه های شهر مثل سنگ تو لحظه ها سخت تو عرصه ها تنگ