Open main menu

BattleTechWiki β

Ultra AC/5

Ultra Autocannon.jpg
Ultra AC/5
Production information
Type Ballistic (Direct, Rapid Fire)
Tech Base Clan / Inner Sphere (IS)
Year Introduced Clan = 2825 CMN

IS = 2640 TH[1]

Year Extinction IS = 2915
Year Reintroduced IS = 3035 FC
Technology Rating E
Availability Ratings D/F/D
Technical specifications
Heat Clan = 1/shot

IS = 1/shot

Damage Clan = 5/shot

IS = 5/shot

Minimum Range Clan = 2

IS = 2

Short Range Clan = 1-7

IS = 1-6

Medium Range Clan = 8-14

IS = 7-13

Long Range Clan = 15-21

IS = 14-20

Tons Clan = 7

IS = 9

Critical Slots Clan = 3

IS = 5

Ammo Per Ton Clan = 20

IS = 20

Cost (unloaded) Clan = 200,000

IS = 200,000

Ammo Cost (per ton) Clan = 9,000

IS = 9,000

BV (2.0) Clan = 122[2]
15 (Ammo)[2]

IS = 112[3]
14 (Ammo)[3]


Introduced in 2640 by the Terran Hegemony[4]. The Ultra Autocannon/5 is an upgraded version of the standard Autocannon/5. Utilizing a different loading mechanism, the Ultra Autocannons are capable of maintaining a substantially increased rate of fire over traditional or LB-X Autocannons at the cost of higher heat and the risk of jamming. Of course, the rapid-fire autocannons require a much larger supply of ammunition to maintain their rate of fire. This high dependence on ammunition limits the effectiveness of the weapon. Being of a lower caliber, the Ultra Autocannon/5 has an increased range at the cost of reduced damage over higher-caliber versions.


The Ultra AC/5 is manufactured on the following planets:

Armstrong Spitfire JU22Edit

Manufactured on Manufactured by Typically used in References
Dunianshire Majesty Metals and Manufacturing
Sterope Sterope Defense Industries

General Motors Nova-5Edit

Manufactured on Manufactured by Typically used in References
Kathil General Motors
Arc-Royal TharHes Industries

Imperator Ultra-5Edit

Manufactured on Manufactured by Typically used in References
Atreus Imperator Automatic Weaponry

KWI UltraEdit

Developed especially for the STN-3L Sentinel, this advanced weapon was capable of firing at double the rate of a standard AC/5, a feature that was unique at the time.

Manufactured on Manufactured by Typically used in References
Hesperus II Kawabata Weapons Industries Sentinel


  • UAC/P
    During the War of 3039, the Federated Commonwealth employed a prototype version of the UAC-5 among some of its elite units. These systems were similar to standard UAC-5s, except they required an additional critical slot, jammed more often when operating at its maximum rate of fire, and could jam even when fired at the standard rate.[5]


  1. Tech Manual, p. 290
  2. 2.0 2.1 TechManual, p. 318, "Clan Weapons and Equipment BV Table"
  3. 3.0 3.1 TechManual, p. 317, "Inner Sphere Weapons and Equipment BV Table"
  4. TechManual, p. 208
  5. Historical: War of 3039, p. 145