AP Regen

AP Regen is the way your Action Points restore
1 AP Regen is equal to 0.01 AP per 0.25 sec, or per in game tick (as the game operates in ticks every 0.25 seconds)
Please note that the in game character sheet shows AP Regen number calculated to per second and not to per tick

The following shows AP Regen sources and their per tick (0.25s) regen as well as their per second regen:

Sources of AP Regen

• Base 100 (0.25 AP per tick or 1 AP per second)
• +1 per Sequence (0.0025 AP per tick or 0.01 per second)
• +5 per Agility (0.0125 AP per tick or 0.05 per second)
• +25 per Claw Module (0.0625 AP per tick or 0.25 per second)
• +12 for Eye (0.0625 AP per tick or 0.25 per second)
• +50 for Action Boy
• +50 for Cowboy effect (0.125 AP per tick or 0.5 per second)
• +25 per Regeneration (0.03 AP per tick or 0.12 per second)
• +100 for Bonus HtH Rapid perks synergy (0.25 AP per tick or 1 AP per second)
• +25 for AP Regen War Event Perk
• +50 for Super Regen War Event Perk

• -2 per Perception
• -12 for Buffout (-0.03 AP per tick or -0.12 per second)

Classes:

• -4 per Luck for Chosen One
• +0.5 per Melee Damage for Deathclaw
• +25 during battle timer for Killer
• +1 per Leader's Charisma on Mobility flag.
• +10 per Agility for Raider
• +50 for Gain Agility for Raider
• +5 per Luck for Random Boy AP Regen super roll (0.0125 AP per tick or 0.05 per second)
• +25 for Gain Luck for Random Boy
• +1 for Soldier (0.0025 AP per tick or 0.01 per second)

Instant AP Regen

Instant AP Regen is recovery of AP after killing something:

• 100% AP for killing a player when the attacker is the Killer class
• 33% AP for killing an NPC when the attacker is the Killer class
• 25% AP for killing an NPC or player when the attacker has the Bloody Mess trait
• 20% AP for killing an NPC or player for each of the attacker's Killing Spree weapon perks
• 20% AP for killing an NPC or player when attacker is using Voodoo drug