  The possibility of generating a large trilinear $A_t$ soft supersymmetry
breaking coupling at low energies through renormalisation group evolution in
the 5D MSSM is investigated. Using the power law running in five dimensions and
a compactification scale in the 10-$10^3$ TeV range, to show that gluino mass
may drive a large enough $A_t$ to reproduce the measured Higgs mass and have a
light stop superpartner below $\sim 1$ TeV as preferred by the fine tuning
argument for the Higgs mass.
