Huma-Air Tuning Regulator for Hatsan AT44 – .25/.30 XXL
This Huma-Air pressure regulator is designed for the Hatsan AT44, Bull Boss, and Trophy air rifles. Installation is straightforward—simply push the regulator into the pressure tube.
The regulator vents to atmosphere without requiring any modifications to your pressure tube. No drilling necessary, and no gradual power creep over time.