BT Paintball Designs warrants the replacement of any original part due to defect in materials and/or worksmanship of this marker. This warranty will be in effect for twelve months for parts and twelve months for labor following the original date of purchase for the original purchaser. Such warranty service will be provided only if the warranty registration card included with this manual is filled in completely and on file at BT Paintball Designs. DoroSports will only accept BT guns that are brand new and unopened for return.