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 = 0

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 C-bills

IS = 200,000 C-bills

Ammo Cost (per ton) Clan = 9,000 C-bills

IS = 9,000 C-bills

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

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


Introduced in 2640 by the Terran Hegemony,[1] the Ultra AC/5 (also UAC/5) was an upgraded version of the standard autocannon/5. Utilizing a different loading mechanism, the Ultra autocannons were 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 required a much larger supply of ammunition to maintain their rate of fire. This high dependence on ammunition limited the effectiveness of the weapon. Being of a lower caliber, the Ultra autocannon/5 had an increased range, at the cost of reduced damage over higher-caliber versions.


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

General Motors Nova-5[edit]

Manufactured on Manufactured by Typically used in References
Kathil General Motors Cataphract,

General Motors PTAA[edit]

Manufactured on Manufactured by Typically used in References
New Avalon Banzai Weapons Design Company Starfire [5]

Imperator Ultra-5A[edit]

Manufactured on Manufactured by Typically used in References
Atreus Imperator Automatic Weaponry Cicada
Shadow Hawk
Luthien Luthien Armor Works Daikyu [7]
Sian Hellespont Industrials Vedette [8]

KWI Ultra[edit]

Developed by Kawabata Weapons Industries 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 Defiance Industries Sentinel [9]


  • 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.[10]


  • This article refers to a common object and addresses the object as a common noun. The preferred term is "Ultra AC/5" or "UAC/5" (except on section titles & table headings, where "Ultra Autocannon/5" is favored).


  1. 1.0 1.1 TechManual, p. 290: "Ultra Autocannon"
  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. Objective Raids, p. 89
  5. Technical Readout: 3026 Revised, p. 98
  6. Objective Raids, p. 120
  7. Technical Readout: 3055 Revised, p. 50
  8. Technical Readout: 3058, p. 50
  9. Technical Readout: Succession Wars, p. 62: "STN-3L Sentinel"
  10. Historical: War of 3039, p. 145