One of the biggest complaints Matrix users have is its air inefficiciency. The KAPP Matrix Adjustable Top Hat is designed to help increase air effciency dramatically. An adjustable ring allows the user to fine tune the air for each shot to ensure than none is wasted. Tests have shown to get around 1000 shots on a 68ci 3000psi tank.
The KAPP Adjustable Top Hat is older, so while it may be available used and in a few cases new, it is not commonly available anymore.