Might be a dumb question but how do you make units engage at the Spider? Im quite new to eden editor so i don't really know

Thank you so much!! I got it working and my playerbase is now terrified.

Holy ever loving hell thank you!

Yeah, the code I posted was just a example of how I added guns for the guy that was asking. If you are editing the code for original author's composition there's a line near the top of the code that says:

spider_target_object = "ProtectionZone_Invisible_F";

Try changing it to:

spider_target_object = "Land_HelipadEmpty_F";

Pretty sure that's all I had to do to get attached turrets to work properly.

I tried to do what you specified, but it just spawns a Fennec with a Praetorian attached to it. How do I just make it spawn this contraption?
Also, in the mission, how do you get the thing to shoot?
Whenever I attatch anything to the original composition, it can't shoot because it's inside the thing's safe zone, so the projectiles just instantly explode.
I've tried going into the long string of code inside the sub and deleting all references to the safe zone (there's only one) and it breaks half the code and the sub spawns without the legs.

Amazing, thank you very much. I might make a video or something of the op I'm working on when we play it so you can see this beast in action.

_truck = createVehicle ["I_MRAP_03_F", [0,0,0], [], 0, "NONE"];
_truck setUnloadInCombat [FALSE,FALSE];

_truck setPosATL (player modelToWorld[0,30,0]);

_pilot = createGroup resistance createUnit ["O_Soldier_VR_F", [0,0,0], [], 0, "NONE"];
_pilot assignAsDriver _truck;
_pilot moveInDriver _truck;
_pilot setCaptive true;

_group = group _pilot;
_group setBehaviour "COMBAT";

_gun = "B_AAA_System_01_F" createVehicle getPos _truck;
_gun attachto [_truck,[0,0,3]];

_gun removeMagazines "magazine_Cannon_Phalanx_x1550";
_gun removeMagazines "magazine_Cannon_Phalanx_x1550";
_gun addWeaponTurret ["cannon_125mm",[0]];
_gun addMagazineTurret ["24Rnd_125mm_APFSDS_T_Red",[0]];
_gun addMagazineTurret ["24Rnd_125mm_APFSDS_T_Red",[0]];

_gunner = createGroup east createUnit ["O_Soldier_VR_F", [0,0,0], [], 0, "NONE"];
_gunner moveInAny _gun;
_gunner setCaptive true;

There's no composition for this one. I just put the original author's composition code into a script file and packed it in the mission pbo.

Go into the eden editor, place a unit down and hit the "play scenario" button. Next hit esc key and paste the code in the above post into the debug console with ctrl + v and hit the "LOCAL EXEC" button.

You can play around with that code and make it shoot whatever you want or attach more turrets/objects using the "attachTo" command. Put some blufor vehicles down in the distance to give it something to shoot at. Here is a list of the all the vehicle guns/ammo in the game:

https://community.bistudio.com/wiki/Arma_3:_CfgWeapons_Vehicle_Weapons

That is basically what I did with the spider.

I cant seem to find this in my compositions even after restarting the game, and I'm also curious how you added the guns.

Thanks for the tip I will try it out and see if that helps I appreciate it.

Seems like CBA isn't working properly for some reason then. If I run Arma without CBA and put the author's composition down in the editor it does the exact same thing (empty sub but still has all the code init box when I click edit). Maybe try unsubscribing CBA then re-subscribing to it and run it as the only active mod like before?

Yes I have Cba Loaded I tried with & without mods only thing was CBA running.
In the editor when I downloaded authors mod, it's just an empty submarine I clicked edit and in the init it has a bunch of code already in it.

Do you have CBA loaded? https://psteamcommunity.yuanyoumao.com/workshop/filedetails/?id=450814997 . It won't do much without it as the composition calls on extra functions that the base game doesn't have.

How do you get this to work? It does nothing it has no legs.