Worked out the M3 Gun for the deck.
Hopefully it passes muster.
I tried to stick with the same method...
not overly detailed, keep it to basic shapes and design.
Thats what I tried to do with the other Guns.
And I will leave it up to the builder if they want to apply extra detailing
or modify the design any further.
I have already darkened the green colour used on the Gun parts
(it looked a lot darker on my screen...until I printed it)
...and I used a wooden dowel for the end of the gun barrel
(which I have coloured green)
but other than that, this is what it looks like.
Unfortunately my Life raft is glued down on the deck of my PT-103,
so I had to CGI the Gun into the deck for this mockup.
But the other two photos are unmodified.