My cousin owns a very similar gun (GR15 CQB) and I have used it in games before. The great hop-up coupled with a tightbore give it very good range and accuracy. If you look at it internally, it's not so great. The internals are relatively weak. I think it'll have good performance in CQB and medium ranges, but if your looking for a gun that's solid internally, it's not the way to go.