  In this paper, we study special generalized null correlation bundles on
$\mathbb{P}^{5}$. We prove that special generalized null correlation bundles on
$\mathbb{P}^{5}$ are stable under some numerical conditions. Moreover, we prove
that the closure of the subvariety parametrizing stable special generalized
null correlation bundles is an irreducible component of the moduli space of
rank $4$ stable vector bundles with corresponding Chern classes on
$\mathbb{P}^{5}$. As an application, we prove that the number of irreducible
components of moduli space of rank $4$ stable vector bundles on $\mathbb{P}^5$
with some fixed Chern classes can be arbitrarily high.
