You can also load revolvers with moonclips if the chamber goes out completely. Besides, less bullets means smarter shooting. Let's face it; how many of Gren's bullets actually hit anything? he spews out at least 1000 in thirty seconds, and just how many of those would actually hit the enemy? Since the guy has to be smart about his bullets (or lucky) he's not wasting time trying to spray and pay like most of us do. Of course that means that dodger types would be his bane cause let's face it, dodging 1000 bullets shouldn't be easier then dodging 1, but even Gren can do that.

If you want him to change weapons tell him. If you don't like his weapon tell him. I for one think it's fine as long as he understands his weaknesses and how it will be exploited against him.