In order to damage the vehicle, the Weapon must have sufficient Penetration stat. default value
of grenade and explosive damage is 15.

It can't damage the NGF's vehicles. At the time of writing this, the vehicle that have weakest armor is the BMP2 and its Armored value is 60. so your AT weapon should have 'armorPenetration' stat.

Like this.
<EffectRange radiusMeters="4.2">
<DamageEffect chancePercent="100" damage="1000" damageType="2" armorPenetration="100"/>
<StunEffect chancePercent="100" innerRangeTimeMSec="1000" outerRangeTimeMSec="1000" armorPenetration="100" />
<SuppressEffect amount="50"/>
</EffectRange>

If you're not a modder and want to use vanilla's AT weapon, you don't have to worry. I gave them armorPenetration. But since it conflicts with mod that modifies all Vanilla AT weapon except Wall penetrating rocket, you have to load NGF Asset pack in the order after that.





The Armor and Main gun penetration of the vehicles I have set at the present time are as follows.




and infantry AT-weapons included from compatible mods.


Note: I wanted the armor penetration of the mod's weapon to be the same as the penetration of the in real world weapon. But there was a problem.

1. Side armor and rear armor are indistinguishable. Armor thickness in all directions 360 degrees is the same. Expressing realistic armor thickness in mod based on the front armor makes most AT-Weapons are unusable. So for the vehicle unit, i had to make a proper compromise between the front armor and the side armor.
2. Depending on the type of ammunition, there may be some variables, but it was difficult to implement them.

For AT-4 which I worked on for the first time, I set the armor penetration parameter to 400 because it can penetrate the Armor 400mm of RHA, and the RPG-26 is also the same.
Enemy RPG-7 is hard to penetrate the M1 Abrams with the Rocket they use, but i wanted it to be a threat, so i made it that can cause probabilistically 'critical'.
The remaining parameters of the weapons were also set accordingly. In the case of some weapons, the data could not be obtained, so it was set arbitrarily.
In the case of 40x46mm HEDP, I had to exaggerate a little.
The 40x46mm HEDP can penetrate the 63mm thickness Armor and it can also threaten BMP-2. But if you do that, it will have less penetration than Dhsk or some powerful HMG.😅 So I exaggerated a little bit.

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In summary, you can make your AT weapons based on real RHA penetration, but you don't have to stick to it. Focus more on whether it's appropriate to penetrate enemy's T-72 or BMP.