Many guns have that gap - remember, with the design of a tilting barrel, there needs to be room thru the front of the slide for the barrel to tilt.
I would say the #1 thing to do is try and let someone else shoot the gun. Get an experienced shooter to try it. Sometimes, sights are off - Occassionally, you need a higher or lower sight. Usually, it is the shooter
But, also, on certain guns, which part of the trigger finger you place onto the trigger can effect how your gun tilts as the trigger is pulled.
When I got my USP compact, it shot low on the 1st trip. I was sure it was the sights, but thought I would give it 1 more shot. For a few days before the range trip, I practiced w/ snap caps. Next trip to the range, itw as fine...
Just my 2 cents