Pros:

1. Pistol and Magnum have limited ammo, adding challenge and removing the unlimited ammo nonsense
2. You can actually use melee when you're incapacitated.
3. Upgrades for pistol.

Cons:

1. Magnum with 56 backup ammunition, Unless you also have a mod that lowers the backup ammo of every other weapon, this would be a con.
2. If you aren't carrying a melee weapon, you will drop your current weapon and it will be replaced with a pistol when you're revived.
3. I noticed that the magnum has an unrealistically fast fire rate of 0.15 seconds, you should increase it to 0.3, like it was originally.

Conclusion:

Unlike the only other limited pistol ammo mod posted here, this makes the magnum have limited ammo as well as not replace your rifle with the SIG. Very good mod for those people who like realism.