1. Make the talent "One is None" active h tt p://imgur.com/Baab4BL
2. Open Cheat Engine and attach it to TheDivision h tt p://imgur.com/ZmGam4s
3. Open your inventory and find your primary weapon magazine size h tt p://imgur.com/h51Vcgq
4. Search for that value in 4 Byte value in Cheat Engine h tt p://imgur.com/CwVZpBk
5. (Un)equip a magazine to change magazine size h tt p://imgur.com/u9HA4vh
6. Search for the new value in Cheat Engine and select them all h tt p://imgur.com/An8RhKL
7. Change each value 1 at a time to something different h tt p://imgur.com/ClJ3pW2
7a. If when you change the value another address's value (or more) also changes to what you put in, you found your magazine size
7b. If when you change the value it resets back or it's the only value to change you can ignore it, it's not the one.
8. Lock in whatever is your magazine size as shown on screen by your selected magazine h tt p://imgur.com/AeJK96j
9. Rinse and repeat steps 3-8 for secondary weapon
10. You can delete all the other non-locked values