People look down a barrel of a gun to be more precise with a single shot than a number of shots in quick sucession.
Probably due to accuracy reasons, and the fact it's a brand mod. It's easier to add burst to said gun as is, regardless of type of gun, then to forcibly make ANY gun a burst. You in a way, get more out of Dahl brand weaponry then to say all of their guns shoot in an semi-automatic fashion down the sights and burst from the hip.
Course if you're cheating and just want for funsies, everything above is moot.
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