Sadly, all we know is that MM was abducted and not the manner in which that was achieved.I am failing to see how the guns are important at all. MM was not abducted at gunpoint was she.
We already know CB is a monster criminal. Criminals have guns.
Similarly we know guns have been found and we know that CB has been seen carrying one. What we don't know is the significance of the weapons found in the property which can be associated with CB.
The searchers knew what they were looking for and when they found it they shut down the search before the allotted time allowed time for the search was up.
My opinion