Ninja Paintball is a division of Pressure Specialist Inc (PSI). PSI has designed and manufactured paintball products for almo ... st 20 years. PSI holds 12 patents covering various paintball products. Many people now recognize the Ninja brand because of our customer service and quality; however, many have used and purchased our products for the past 15 years under different brands. We design and manufacture various regulators, fill stations, hose assemblies, and many other paintball products. We have manufactured more regulators for paintball over the past 15 years than any other company! Our past clients we have made private label air systems for include Kee Action Sports (Pure Energy/Evil) ®, National Paintball Supply, Procaps (DXS) ®, Tippmann®, Kingman®, Custom Products®, Smart Parts®, WGP®, JT Sports® and many others. PSI also manufactures products for many clients outside of paintball. These products range from regulators used in auto racing applications, aerospace, to airsoft and airguns. PSI is an active and contributing member of ASTM sub committee F08.24 for paintball. PSI / Ninja Paintball products are proudly manufactured in the U.S.A. We believe this still matters. read more