BT-4 Spring Kit Empire $25.00 Default Title - $25.00 Quantity This product is currently out of stock. We may not keep this item in stock. Please fill in the form below and we will let you know availability! EMPIRE BT-4 SPRING KIT 5 Piece Spring Kit For BT-4 Markers, will also fit Tippmann 98/A5/X7 Markers. Features: Includes 5 different main/velocity springs, two harder than stock, 1 stock, and 2 softer than stock Blue Spring - Ultra Light Green Spring - Light Black Spring - Stock Silver Spring - Medium Red Spring - Hard
