Vanguard weapons. . .

[Blind Owl]

So... not the laser pistol then....

Precisely.

 

[Shadow Reaper]

The calculator won't open right now so I can't check, but I believe if you look at the very short S5 list, at top is the version we will eventually be able to mount, and near the bottom is the Vanduul version. Looks like we will be able to mount their weapons, but keep in mind they overheat quickly. They're designed same as all their craft, for swift, heavy attacks. Generally their stuff would be good mounted on Ghost Hornets, Prowlers or anything that attacks from stealth.

I just opened the calculator to check this and 3 of the 4 S5 weapons are now missing. Interesting. Worth keeping an eye on to see how it updates. My guess is the S5 Vanduul originated WAR cannon will be some sort of limited access, in-game reward for taking down Vanduul.