MechWarrior Online Wiki
Equipment Overview
Ultra Autocannon 5 
Ultra AC5.JPG
Tech Base: Inner Sphere 
Equipment Type: Ballistic Weapon 
Tonnage: 9 tons
Ammo per Ton: 30 
Critical Slots: 5  
Item Health: 10  
Cost: Cbill.png 400,000  
Sell: Cbill.png 200,000  
Equipment Specifications
Recycle: 1.66
DPS: 3.01
Heat: 1
HPS: 0.6
Range: 600m 
Maximum Range: 1200m
Projectile Velocity: 1300
Impulse: 0.03
Cockpit Shake: 0.15




This class of Autocannon can fire up to twice as fast and a little farther than the standard AC 5. The Ultra Autocannon 5 (UAC/5) does reasonable damage per shot and can reach out to long ranges. At nine tons, the weight of the UAC/5 is relatively light for an Autocannon. Each ton of ammo yields an ample 30 rounds. To use the weapon in double fire mode, you can simply fire it again before it has a chance to completely recycle.


The weapon has a 15% chance to jam if double fire mode is used. If it does jam, it will unjam itself after 5 seconds.

Tactical Use[]

The UAC/5 is capable of doubling it's firepower, the tradeoff being a 15% chance to jam. On the battlefeld that means a pilot gets an additional shot out of the gun to increase frontloaded damage. This can be vital in do-or-die situations and an advantage in fights using cover. As a jam takes 5 seconds to get fixed it's a hard gambit to use the doublefire in open brawling encounters.

If we are to compare the effective rate of fire we end up with:

  • AC/5: 5 damage / 1.66 seconds = 3.01 dps
  • UAC/5: On average jams every 6.67 shots fired in cooldown resulting in a 5 second jam time: 6 shots (first shot + 6.67 fast shots) * 5 damage / (6.67 * 0.83 seconds + 5 seconds jam) = 38.33 damage / 10.5361 seconds = 3.638 dps

This means for plain DPS purposes the UAC/5 beats the standard AC/5 by nearly 21%, and most of that damage is delivered earlier in the fight than with the standard AC/5. Drawbacks are its unstable fire rate and higher weight.

Don't panic with this weapon... 3 or more tons of ammo recommended per UAC/5.


  1. Piranha Games\MechWarrior Online\Game\GameData.pak\Libs\Items\ItemStats.xml
  2. How screen shake is calculated