Thanks for answering.

Not at the moment as I'm focusing most of my free time on the current Space Engineers series, Return to Earth.

Maybe at a later date though.

Ever plan on making more subs?

Sorry Djmonster, I've just done even more testing and I can't replicate your issue with the turrets, they work fine for me and I can change them and even uninstall them and leave them empty with no problems at all during the campaign.

My best advice would be to check the mods that you've got installed to see if any of them are causing issues.
It might be worth noting that there's been some changes to the campaign since the last patch and it might just be that some outposts may not be able to do certain things, or you might need more rep with the owning faction - again this will need to be something that you can check on your side.

As mentioned below (and in the disclaimer above) this is just a sub made using the in-game editor using stock base-game components and shouldn't cause any problems.

No idea why you're having that issue as they use the same turrets and periscopes as the vanilla submarines.

In fact I play using several mods, including the EK Armory mod and I've been able to change the turrets on both the Triton and Triton-E okay so far.

This is a great submarine, but when you play with mods, but you can't change guns.

Thanks, I might do at some point in the future, especially after I've finished the current Space Engineers series I'm working on and have more free time.

Hey! I know these things take a long time to make, but this is a perfect chassy. Not because it's op, but the layout. Without a doubt, this is my favorite sub. But could you make some more, new subs? Thanks!