[MAC gun]

Make it big, make un-turnable

[Recoupler part.]

Think it could be had that the coupler parts would only attach to ones that share the same key input or Tag input
This would allow targeted coupling, as well as make it have a nice potential for complexity

[Railgun?]

Or it could be a railgun projectile and/or rail, as it is currently possible to design one, but it's expensive and underwelming

[Mini Drone Rack]

It would likely be better to have it be sorta like the test enemies in the testing option, and they stay around your ship, not that powerful but cool to have