I have been looking at extended length drop in barrels for my G19. Lone Wolf offers a 4.6" barrel (G17 length) and a 5.3" (G33 length). In my mind, this would increase velocity slightly and also improve accuracy somewhat while still keeping the G19 size. Is my thinking correct? Or would the sole improvement in accuracy be derived from a longer sight distance (longer slide in the G17 or G33)?