Ninja Paintball is a division of Pressure Specialist Inc (PSI). PSI has designed and manufactured paintball products for almost 20 years. PSI holds 12 patents covering various paintball products. Many do not recognize the Ninja brand; however, they do recognize and have used and purchased Ninja Paintball products for the past 15 years. Ninja design and manufacture various regulators, fill stations, hose assemblies and many other paintball products. They have made more regulators for paintball over the past 15 years than any other company!