Tw0 Fang is the tier 5 skill in Zer0's Cunning skill tree. It gives any weapon fired a chance to fire twice.

Effects

• Double Shot Chance: +6% per level

Level	1	2	3	4	5
Double Shot	+6%	+12%	+18%	+24%	+30%

Level	6	7	8	9	10	11
Double Shot	+36%	+42%	+48%	+54%	+60%	+66%

^{Can only leveled past 5 with Professional, Rogue, and Legendary Killer class mods.}

Notes

• Tw0 Fang functions somewhat similarly Mordecai's Gun Crazy skill from Borderlands, but affects all weapon types.
  • Unlike Gun Crazy, Tw0 Fang causes a two-shot burst rather than firing two shots at once. This consumes additional ammo and causes recoil as normal.
• The Shadow of the Seraphs' special effect is additive with Tw0 Fang, effectively increasing the chance that two shots will be fired by the amount listed on the relic. Notably, with a perfect level 62 or above Shadow of the Seraphs relic and an Unparalleled Professional or Rogue class mod it is possible to achieve a 100% chance of double fire with each shot.
• Tw0 Fang's effect requires a minimum delay between shots, this means that it will not trigger on weapons with a fire rate of roughly 10.0 or above. This includes weapons which have a base fire rate at or above 10.0, and those which are boosted to or above 10.0 by skills, relics, class mods, and/or Badass Rank.
  • As such, many SMGs and Assault Rifles are affected by this exclusion.^[1]
  • The above information was primarily tested on Xbox, and does not apply to PC. On PC, the effectiveness of Tw0 Fang seems to be largely governed by framerate; the higher the framerate, the higher the fire rate Tw0 Fang will function properly. This has the side effect of reducing its effectiveness in high-traffic areas with weaker computers; any time framerates dip, the effectiveness of Tw0 Fang will also dip equally.^[2]
• As it allows 2 or more shots to be fired in rapid succession, it can be useful in circumventing slow fire rates, particularly when combined with a Shadow of the Seraphs relic.
  • The Elephant Gun, Rex and Damned Cowboy benefit the most from this setup.

References

Zer0 skills

Decepti0n
Sniping	Cunning	Bloodshed
At 0ne with the Gun • B0re • Critical Ascensi0n • Headsh0t • Kill C0nfirmed • Killer • 0ne Sh0t 0ne Kill • 0ptics • Precisi0n • Vel0city	Ambush • C0unter Strike • Death Bl0ss0m • Death Mark • Fast Hands • Fearless • Innervate • Rising Sh0t • Unf0reseen • Tw0 Fang	Backstab • Be Like Water • Execute • F0ll0wthr0ugh • Grim • Ir0n Hand • Killing Bl0w • Like The Wind • Many Must Fall • Resurgence