Nope that is technically within the rules. Just make sure the gun barrel does not go inside the truss blocks. I had no idea that was a thing though so thanks for telling me.

Does it count as clipping a gun barrel if you build one with the muzzle right up against the truss? It's easy to do that way, because APS shells spawn 1m past the muzzle and therefore can spawn on the other side of the truss without the barrel going through it.

Ahh I forgot those existed as well.

Plus warp drives.

Well I feel like all the work I put to spawn it in with time bombs inside of it was wasted.Good job on finding two ways to beat it. I'll account for those two thing when I make another challenge. Glad the piston thing worked out for you as well.

I'm here and I managed to do it twice,
First I made a sub vehicle spawner, spawned in a single block inside the AI, then built it and then detached it, it collided with the AI and killed it.
Second was similar, I built a piston, since the extending bit has no hitbox it went right though, then I set the distance to be inside the AI, built a block and killed the AI.
There doesn't seem to be a rule about building things so I would say that's a win.

All I did was challenge you and anyone else who saw the comment. Over the last two videos, you and the people helping you changed something random I said in the comments (sub mast and the brokenness of docking stations) into something amazing. I hoped this could spark something with this as well. My intention with the challenge is to teach people about clever ways to armor yourself against EMP, HEAT and HESH. If you would like to make a video on it, I would be honored.

Hey man!
Saw your comment on my video!
Unfortunately YouTube deleted it automatically because it contained a Link (I have no idea why it deleted yours and yet I still have to manually delete 1-2 spam comments per video), with no way for me to recover it. The only way I even got here was through the notifications!
If you want I can show it off on the channel in a dedicated video, it seems like a fun little curiosity!
Had a bit of a play around with it but didn't find a solution yet, ill have another go tomorrow once I got back some sleep!