Gametitle-FNV OWB
Gametitle-FNV OWB

The protonic inversal axe is a weapon in the Fallout: New Vegas add-on Old World Blues.


The protonic inversal axe is a variant of the proton axe, having a dark blue-violet blade, whitish capacitors, and a black handle. Compared to the standard proton axe, it deals increased damage and much more critical damage, in addition to being much more durable. It is a very effective melee weapon against just about any enemy, especially robots or power armor users.

Special attackEdit

It has a special Inversal Scarifier attack that does 200% damage in V.A.T.S. at the cost of 10 more action points (requires a Melee skill of 50). Note that this attack may strike more than one opponent, but is not guaranteed to do so even if the animation indicates that it passed through other opponents.

Type of attackIcon attackSkill requiredIcon abilityDamage per attack in V.A.T.S.Icon damageAction point costIcon actionDamage per action pointIcon dap
Inversal Scarifier50232356.63
Note: Melee weapons do double normal damage in V.A.T.S.

It is possible to execute Inversal Scarifier outside of V.A.T.S. (without the required Melee skill of 50 to perform the move) by initiating a power attack (hold attack button) while moving forward.


The protonic inversal axe can successfully strike about 1245 times from full condition before breaking.



Weapon name (current weapon is highlighted)Icon meleeDamage per attack (damage per projectile)Icon damageDamage per secondIcon dpsBonus effectsIcon bonus effectAttacks per secondIcon attackCritical Chance % multiplierIcon chanceCritical damageIcon critical damageAction Point costIcon actionDamage per action pointIcon dapDurability (number of attacks before breaking)Icon repairWeightIcon weightValue in capsIcon merchantValue to weight ratioIcon ratioSkill requiredIcon abilityStrength requiredIcon fist
Proton axe fnvowbGametitle-FNV OWB50
90.8+50 empIcon EMP robots
+20 empIcon EMPpower armor
Protonic inversal axe fnvowbGametitle-FNV OWB58
105.3+50 empIcon EMP robots
+20 empIcon EMPpower armor
Proton throwing axe fnvowbGametitle-FNV OWB40
32.2x1.5 limb damageIcon damage
+50 empIcon EMP robots
+20 empIcon EMPpower armor
Protonic inversal throwing axe fnvowbGametitle-FNV OWB60
52.7x1.5 limb damageIcon damage
+50 empIcon EMP robots
+20 empIcon EMPpower armor
Note: Melee damage is doubled in V.A.T.S.



  • When any type of drug wears off, the blade of the axe is momentarily shifted to a yellow tone, before changing back to violet as the blur fades.
  • In Camp Searchlight when the sky and the area around is green the blade will turn white.
  • All cyberdogs are affected by the additional EMP damage done by this weapon.

Behind the scenesEdit

  • The technology used by this weapon appears to be similar to the electric weapons created in the Secret Vault by Vault-Tec.
  • The protonic inversal axe is based on the proton ax of Wasteland, the 1980s game which is considered to be Fallout's predecessor.