  We determine the radiative corrections to the masses of the gauginos and
Higgsinos in the MSSM, including all sectors of the theory in a one-loop
calculation in the on-mass-shell renormalization scheme. We find that a gluino
which is massless at tree level receives a mass of between 0 and 3 GeV,
primarily due to the top/stop contribution. This radiatively generated mass
depends directly on the off-diagonal element of the squark mass matrix. In the
case of a massive gluino, its mass receives typically large corrections, as
large as 40\% for a 125 GeV gluino. We find that the contributions to the
neutralino and chargino mass corrections from the gauge/Higgs/gaugino/Higgsino
sector are typically +-1%. The lightest neutralino, which can receive
corrections larger than 25%, receives 5% corrections over most of the parameter
space. We combine our results with the results of LEP and CDF searches to
obtain the lower bounds on the neutralino and chargino masses at one-loop. We
also demonstrate how the radiative corrections affect the presently excluded
region of parameter space.
