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Weapon proficiency

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Weapon proficiency is a passive attribute in Borderlands that a character can build for each weapon type. Characters gain proficiency for the equipped weapon whenever experience is gained from a kill. This applies even if the kill is scored by an allied unit, including a team mate, a Bloodwing or a Scorpio Turret. Kills scored from standard melee attacks and grenades also count towards the class of the weapon currently wielded.

Bonuses

Each proficiency level gives you three bonuses for every weapon in that category, which affect different weapon characteristics:

Damage - Adds to the weapon's 'Manufactured Damage'.
Reload Speed - Decreases the time it takes to swap out a weapon's magazines.
Accuracy - Improves the character's handling of the weapon. See Accuracy.
Stability - Exclusive to Sniper Rifles, Stability decreases the time it takes for a rifle to 'settle' after lining up the scope, after firing a shot and after taking damage.[citation needed]
Cooldown Rate - Exclusive to Eridian Weapons, Cooldown reduces the time it takes an Eridian weapon to recharge.
Rate of Fire - Increases the rate at which a weapon can fire one shot after another. While not exclusive to any one weapon type, Shotguns and Sniper Rifles earn a rate-of-fire bonus for proficiency.

  • Unless otherwise noted, guns receive Damage, Reload Speed, and Accuracy bonuses.
  • Sniper rifles replace Bonuses #2 and #3 with Rate of Fire and Stability.
  • Eridian weapons replace Bonus #2 with Cooldown Rate
  • Shotguns replace Bonus #3 with Rate of Fire.
Level Experience Bonus #1 Bonus #2 Bonus #3
Required
to level up
Total Damage Reload Speed
Rate of Fire
Cooldown Rate
Accuracy Stability Rate of Fire
1 2,400 2,400 - +6% - - -
2 4,800 7,200 - +6% +9% +12% +6%
3 7,200 14,400 +3% +6% +9% +12% +6%
4 9,600 24,000 +3% +12% +9% +12% +6%
5 12,000 36,000 +3% +12% +18% +24% +12%
6 14,400 50,400 +6% +12% +18% +24% +12%
7 16,800 67,200 +6% +18% +18% +24% +12%
8 19,200 86,400 +6% +18% +27% +36% +18%
9 21,600 108,000 +9% +18% +27% +36% +18%
10 24,000 132,000 +9% +24% +27% +36% +18%
11 26,400 158,400 +9% +24% +36% +48% +24%
12 28,800 187,200 +12% +24% +36% +48% +24%
13 31,200 218,400 +12% +30% +36% +48% +24%
14 33,600 252,000 +12% +30% +45% +60% +30%
15 36,000 288,000 +15% +30% +45% +60% +30%
16 38,400 326,400 +15% +36% +45% +60% +30%
17 40,800 367,200 +15% +36% +54% +72% +36%
18 43,200 410,400 +18% +36% +54% +72% +36%
19 45,600 456,000 +18% +42% +54% +72% +36%
20 48,000 504,000 +18% +42% +63% +84% +42%
21 50,400 554,400 +21% +42% +63% +84% +42%
22 52,800 607,200 +21% +48% +63% +84% +42%
23 55,200 662,400 +21% +48% +72% +96% +48%
24 57,600 720,000 +24% +48% +72% +96% +48%
25 60,000 780,000 +24% +54% +72% +96% +48%
Level Experience Bonus #1 Bonus #2 Bonus #3
Required
to level up
Total Damage Reload Speed
Rate of Fire
Cooldown Rate
Accuracy Stability Rate of Fire
26 62,400 842,400 +24% +54% +81% +108% +54%
27 64,800 907,200 +27% +54% +81% +108% +54%
28 67,200 974,400 +27% +60% +81% +108% +54%
29 69,600 1,044,000 +27% +60% +90% +120% +60%
30 72,000 1,116,000 +30% +60% +90% +120% +60%
31 74,400 1,190,400 +30% +66% +90% +120% +60%
32 76,800 1,267,200 +30% +66% +99% +132% +66%
33 79,200 1,346,400 +33% +66% +99% +132% +66%
34 81,600 1,428,000 +33% +72% +99% +132% +66%
35 84,000 1,512,000 +33% +72% +108% +144% +72%
36 86,400 1,598,400 +36% +72% +108% +144% +72%
37 88,800 1,687,200 +36% +78% +108% +144% +72%
38 91,200 1,778,400 +36% +78% +117% +156% +78%
39 93,600 1,872,000 +39% +78% +117% +156% +78%
40 96,000 1,968,000 +39% +84% +117% +156% +78%
41 98,400 2,066,400 +39% +84% +126% +168% +84%
42 100,800 2,167,200 +42% +84% +126% +168% +84%
43 103,200 2,270,400 +42% +90% +126% +168% +84%
44 105,600 2,376,000 +42% +90% +135% +180% +90%
45 108,000 2,484,000 +45% +90% +135% +180% +90%
46 110,400 2,594,400 +45% +96% +135% +180% +90%
47 112,800 2,707,200 +45% +96% +144% +192% +96%
48 115,200 2,822,400 +48% +96% +144% +192% +96%
49 117,600 2,940,000 +48% +102% +144% +192% +96%
50 120,000 3,060,000 +48% +102% +153% +204% +102%
k 2400*k 1200*(k^2+k) floor(k/3)/100*3 ceil(k/3)/100*6 ceil((k-1)/3)/100*9 ceil((k-1)/3)/100*12 ceil((k-1)/3)/100*6

Notes

  • Proficiency levels can be checked on the character status page.
  • Proficiencies can be increased to a maximum level of 50.
  • Experiences gains from mission rewards do not count towards weapon proficiency.
  • Weapon proficiencies are not affected by kills in Mad Moxxi's Underdome Riot, due to the lack of experience gained from kills in that area.
  • Brick does not gain weapon proficiency experience while using Berserk as he has no weapon equipped while in his berserk state.
  • There is a bug for PC users where simply mousing over the sniper proficiency bar will not show the bonuses of the weapon proficiency. Instead, left clicking the sniper proficiency displays its bonuses, as does using the up/down arrow keys to select the sniper bar.
  • Prior to release, higher proficiencies were meant to lower the level requirements to equip guns of that category. Although this feature was removed and has no effect on the game, when a weapon is equipped, the "Level Requirement" field on the weapon's item card is shown lower than it really is. Players can un-equip the weapon to check the actual required level.
  • Characters do not receive proficiency if a teammate kills an enemy while players are in a menu.
  • Weapon proficiencies do not exist in Borderlands 2; comparable effects are gained through skills, class mods, and Badass Rank.

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