  We introduce a multiplicative version of complex-symplectic implosion in the
case of $SL(n, \C)$.
  The universal multiplicative implosion for $SL(n, \C)$ is an affine variety
and can be viewed as a nonreductive geometric invariant theory quotient. It
carries a torus action. and reductions by this action give the Steinberg fibres
of $SL(n, \C)$. We also explain how the real symplectic group-valued universal
implosion introduced by Hurtubise, Jeffrey and Sjamaar may be identified inside
this space.
