The TECHT MRT Spring Kit provides players with three distinct levels of resistance which will allow for lower operating pressure, as well as reduced dwell times.

This means better efficiency, a smoother shot, and more time on the field rather than at the fill station.

• You can use these springs in the Phenom, but they can allow the bolt to operate at a very low, very efficient pressure, that is sometimes to low to operate the cyclone feed. Use with a Phaze 5, or just the Phaze 5 instead.