If the MrAntiFun version crashes your game, try these "hot" replacements for single-player:
While the MrAntiFun trainer was largely marketed for single-player use, the "hot" nature of these cheats carried significant risks. Battlefield 3 utilized , a robust anti-cheat system designed to protect the integrity of its massive 64-player multiplayer battles.
Choose between ammo that never runs out or weapons that never require reloading.
For maximum safety, set your EA/Origin client to "Go Offline" before playing the campaign with cheats enabled.