Just some minor stuff. Nothing to compare to Fenrir's complete makeover back in the day.
Alright, so Gunner's custom weapon is now simply called the Holster. In all other respects, it is the same.
The Holster cannot change form, even when a GMO file is used. It remains a nondescript black leather holster fit for an assault rifle, and always will. This is because it isn't strictly a part of Gunner's programming. However, the Holster can be obscured in a normal fashion.
It's all fluff.