MR2, it depends. I own two, had trijicons put on both my sub and the compact and they are very, very tight. On my sub the gunsmith came out sweating getting them in, and I had the compact front sight drifted a little and I heard the ping of the tool he was using to drift it over from way out in front of the store. Hopefully it's your sight's metal as opposed to the slide cut out. If I were you I would take it to a competent honest gunsmith and have him take a look at before I sent it to Beretta.

Any reasonably competent gunsmith can tighten a dovetail slot.
If you know what you're doing, you can do it yourself.

It's such an easy job, a 'smith could probably do it while you wait, and it shouldn't cost much.