The current base armour stats from Oxmallards armour list:
Chain Shirt: Base AC 4, Max dex 4
Scale Mail: Base AC 4, Max dex 4
Chain Mail: Base AC 5, Max dex 2
Splint Mail: Base AC 6, Max dex 1
Banded Mail: Base AC 6, Max dex 1
Half Plate: Base AC 7, Max dex 1
Full Plate: Base AC 8, Max dex 1
Notice that for chain shirt, scale mail and half-plate, the Base AC and Max Dex sum to 8. If anyone ever deciedes to tinker with base armour stats, I would suggest that the max dex for chain mail, splint mail and banded mail be increase by 1. Then with the exception of full plate they would all sum to 8.
Giving:
Chain Shirt: Base AC 4, Max dex 4
Scale Mail: Base AC 4, Max dex 4
Chain Mail: Base AC 5, Max dex 3
Splint Mail: Base AC 6, Max dex 2
Banded Mail: Base AC 6, Max dex 2
Half Plate: Base AC 7, Max dex 1
Full Plate: Base AC 8, Max dex 1
Is the reason for the current armour system in NWN historical from D&D armour stats?