Tank repair ideas?

So having bought 2 copies of this expansion, I need help/advice with regard to gun repair.
I don't have all the barrels as some were missing from the box. I was very careful opening and examining the contents.
So, having not heard back from PSC, I need to fix this problem myself.
Any thoughts on replacement guns? What have others done?
I can't believe no one has come up with a solution.
Thanks in advance.
Robert

I do not have expansion, but I would anyhow try to pursuit solution with PCS - evidently, if you say some barrels were missing they should replace them.

I had e-mailed them about it and a few figure defects a week and a bit ago.

No response as of yet.

Thanks though.
Robert

I have repaired the tank guns on many different types of 15mm tanks using some tiny aluminum tubing that can be found at a hardware store.
Get a drill bit that is the same diameter as the tubing, start a small hole where the gun is supposed to go (just twirl the drill bit in your fingers, don't use a powered drill), cut the tubing to the right length and super glue the tube into place.
The tubing can be easily cut using a back and forth rolling motion with an Exacto knife.
Does that help?