These matches are intended to ensure a more level field of competition. They are selected from some of the more difficult matches, and their lower numbers are intended to ensure high turn-out of competitive shooters. The scores from these matches are going to be more hard-won.
The Regional Series and Pro-Series both have qualifier matches. The AG Cup Series does not, as each match in that series is itself a qualifier for the Armageddon Gear Cup. However, AG Cup Qualifier matches are also Pro-Series Qualifiers.