Ekotron34,875 23 Mar 2026 14 Sep 2025
The M4 will be given at the beginning of the mission "Rub Out". It is not possible to buy this weapon at Ammo Nation in Downtown already.
Before you reach Diaz, you have to kill a lot of other people. Kill them with another weapon so you will have enough ammo to kill Diaz after he retreats in his office.