ACP BT Velocity Booster Kit

This is a velocity booster kit for the BT markers. The kit consists of 3 different sized spacers that are slipped over the spring guide to increase spring tension. The small spacer gives about 15+ F.P.S, the medium about 25+ F.P.S., and the large one about 35+ F.P.S.. This kit does not require extra parts for installation, and gets rid of any guess-work...it's simple bigger spacer = more velocity. This kit also eliminates the need for a spring kit, but can be used in conjunction with one for fine tuning velocity. Remember to re-chrongraph the marker after making any changes to the velocity.