The gun is capable of full-automatic fire.
Included from MultipleTargets
Autofire is a special case of area attack that allows you to hit several times against the same target or different targets in the same general area. You must fire three rounds with each attack, and may not reload during the attack sequence.
If firing on several targets, use the normal area effect rules.
When attacking one target several times, resolve each attack separately, but there is a -2 penalty on each successive attack. For each attack beyond the first, you must expend one additional shot hosing the target down, but you perform all these attacks simultaneously. You also get one "free" attack against each friend or bystander in your line of fire, with no penalty.
Once a target starts to use ActiveDefense, he gets to apply the Dodge bonus against all your attacks, as they all come in the same shot.