Something not quite right here
All sounds very interesting, certainly not random and definitely well planned with intimate knowledge of operations. Offender described as "military" but not confirmed, I doubt if it was a bonafide "military" clandestine operation but there is something smelly about this whole scenario.
Any pseudo or para-military type organisation would be able to pull this sort of thing off in our "peace time" semi-operational environment. Indeed any of a number of motorcycle clubs or para-military organisation that I could think of would be more than capable of this type of operation.
The sailor involved was not killed indicates a certain level of control, I am somewhat confused that there was only one reported offender, with the level of planning I would expect others were involved. A dozen small arms are still quite a haul for one person to decamp with.
Was access by sea? Knowing the layout of the base (albeit a few years ago) I can not see someone running out of the front gate carrying a cashe of weapons.
Interesting to see how this one unfolds and more to the point what information/disinformation we a fed by our overtly bias media.
Just my 2cents worth