Please mention in order notes what model blaster you have so we can match the tpiece
NOW COMES WITH HEAVY RETURN SPRING
M4A1 GEN9 MULTI UPGRADE PACK
INCLUDES:
UPGRADE PACK 1 includes ... GEN9 10(1.3mm SPRING, J9 HOPUP or beast adc, ALLOY BARREL(33.5),T-PIECE)
GEN9 / 10 HULK UPGRADE includes.... (UPGRADED 460 LONG MOTOR, FULL METAL GEAR SET, UPGRADED PISTON + O'RING)
+ HEAVY RETURN SPRING
+ BEARING X 6
+ SHIM KIT
Best Value Kit ... all parts match and we use them everyday!