Most GTA 5 firefights become more entertaining the moment you stop treating them like ordinary missions. The Story Mode weapon phone code gives you a full combat loadout on demand, which makes it perfect for testing cars, replaying set pieces, or turning a quiet Los Santos drive into a ridiculous action scene after you've sorted out your buy GTA 5 Money plans elsewhere. It won't create permanent ammunition or carry over to GTA Online, but used with a little restraint, it changes the pace of the whole game.

The Main Weapon Input

Open the phone in GTA 5 Story Mode with the Up direction on your controller, move to the keypad, and enter 1-999-866-587. Call the number and the character receives the standard weapon set with ammunition, including pistols, automatic weapons, rifles, shotguns, sniper equipment, grenades, a knife, and a rocket launcher. On PC, press the tilde key, type TOOLUP, and press Enter. The phone method is usually more convenient on consoles, while the PC command is faster once you remember the letters.

Use the input in free roam rather than during a restricted mission segment.
Save before activating it if you care about keeping a clean progression session.
Equip the weapon you want before adding an ammunition effect.
Do not expect the loadout to create unlimited ammunition after restarting.

Pick the Effect That Fits the Experiment

Weapon access is only the starting point. Explosive ammunition, flaming ammunition, explosive punches, slow-motion aiming, and temporary invincibility all create different kinds of fun. From what I've seen, explosive rounds are best for vehicle testing and dramatic escapes, while slow-motion aiming gives you more control without removing every tactical decision. Flaming rounds look great in open areas, but crowded streets can become chaotic very quickly.

Quick Reference for Story Mode

Why the Combo Order Matters

For a controlled combat test, activate TOOLUP first, choose one main firearm, and then add a single modifier. HIGHEX turns ordinary gunfire into heavy vehicle damage, but firing beside your own car can ruin the experiment instantly. PAINKILLER lasts for five minutes, so it works well for observing police response or testing enemy behavior. DEADEYE can be activated repeatedly to increase its slow-motion strength through several levels, then switched off after the strongest setting.

Save Management and Common Mistakes

Activated codes affect the current Story Mode session by disabling trophies and achievements until you reload a clean save or restart the game. They don't permanently damage your save, but a manual save before testing is still the smart move. GTA Online is separate, and Story Mode phone inputs won't provide the same equipment there. I could be wrong but, in some mission sections, the game may reject an input or limit its effect, so free roam remains the least frustrating place to test it.

My Best Use for TOOLUP

Use the weapon input as a creative reset rather than pressing it before every mission. Try a sniper-only escape, a slow-motion precision run, or a vehicle test with explosive rounds while standing well away from civilians and traffic. That keeps the pressure of GTA 5 intact while giving you room to experiment. For players who want a separate Story Mode setup or a different starting point, GTA 5 Accounts can be considered, but the weapon input itself remains the fastest way to reshape a single session.