Not necessarily more accurate mate. Accuracy falls on a couple of things, paint quality and lots of practice.Bought BT 4 combat as my 1st marker as you can customise it a lot and there pretty cheap. I'm yet to use it but I'm already thinking I should have waited for a 2nd hand etha to pop up as there lighter/electronic so more accurate.
A barrel will do little to help if you can't shoot, and have purchased recreation level paint