fix: Firearm pickups spawning without ammo

[Someone-193]

Description

Describe the changes
Fixes a bug where firearm pickups spawned in had no ammo

What is the current behavior? (You can also link to an open issue here)
When spawning most firearms, they don't have any ammo inside of them

What is the new behavior? (if this is a feature change)

Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

Other information:
Appears to work with revolvers and shotguns too

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentations

Submission checklist

• I have checked the project can be compiled
• I have tested my changes and it worked as expected

Patches (if there are any changes related to Harmony patches)

• I have checked no IL patching errors in the console

Other

• Still requires more testing