Spares: Upgrade "Red" Heavy Main Spring: Tippmann/BT/Valken

Upgrade heavy spring (aka Red Spring) to fit the Valken SW1 and Blackhawk, BT Combat series and some Tippmann models such as Cronus, Sierra and Bravo.

Mainly for security use - NOT FOR PAINTBALL USE as this may push you over the allowed velocity limit on playing fields and also may result in paintball bursting in your marker.

WARNING: the use of this heavy "red" spring does put more strain on your marker's internal mechanism and the installation / use of it is done entirely at your own risk. It may also void manufacturer's warranties if you have a newer marker, or damage valve housings on older markers.