To Infinite Ammo:
1. Go To Practice Mode
2. Open Cheat engine, target proccess.
3. Select your weapon
4. Scan the remaining Ammo of the Selected Weapon (4 Bytes)
5. Use 1 Ammo of Selected Weapon
6. Scan the remaining Ammo again.
7. select the one and Only Address
8. Right click
find out what accesses this address then click
YES
9. Now shoot again.
10. now select for
mov [ecx+58],eax and
show disassembler
11. Click on
tools and then click
Auto Assemble
12. Click
Template and then click
Code Injection
13. Now remove
cmp eax,00 and change
mov [ecx+58],eax to
add [ecx+58],99
14. Now copy it and paste it to
//paste your code here
15. Now Click
execute then ENJOY!!

and press thanks
FOR USE OF WEAPON:
Place your mouse on the weapon you want then press on keyboard SHIFT + (numbers from 0-9) and after seeing the number above the weapon. press the NUMBER in the game and you will x99