Standard AutoCannons

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Standard AutoCannon (AC for shorthand) are the most basic ballistic weapon systems in Mechwarrior: Living Legends. They represent various auto-loading burst-fire and single shot ballistic weapons.


Old Warhammer variant firing an AC10

Standard AutoCannons deliver damage by firing ballistic high explosive kinetic shells at varying rate-of-fire. There are four classes of Standard AutoCannon: AC2, AC5, AC10, and AC20. The arbitrary number system roughly indicates the respective damage-dealing capabilities; larger numbers (AC20's) will deal much greater damage per ammo than smaller numbers (AC2's). Conversely, the weapon range drops for larger numbered AutoCannons. Because of the explosive nature of the AC shells, the splash damage can damage adjacent components of the hit asset.

In MWLL setting only Inner Sphere units still use standard AutoCannons, Clanners have replaced them with Ultra AutoCannons and Lubalin Ballistics-X AutoCannons.

Weapon Stats

Weapon Max Range Dmg Drop
Dmg Drop
Hit Damage/Shot Damage
Splash Damage/Shot Damage
Sec. Splash
Damage Type
Splash Radius
Ammo cost
AC2 1200m 1200m 10 6 x 23 Light Kinetic 6 x 23 Light Kinetic 6 x 5 Frag 1m / 1.5m 11.8 75 75 2500 9 360 250
AC5 795m 800m 3 x 75 3 x 75 3 x 50 1.3m / 2.5m 10.7 112 112 1800 9 128 450
AC10 615m 650m 1.5 30 Heavy Kinetic 30 Energy 100 1.45m / 2.8m 114.3 138 241 1400 3 240 750
AC20 345m 350m 20 300 300 600 1.6m / 3.2m 26.6 310 310 900 38 22 1000
All stats are current as of release 0.13.3

Gameplay & Hints

AC2 and AC5

  • Long range makes them suitable for direct fire support weapons, aiding friendly brawler units from a safe distance

AC10 and AC20

  • AutoCannon-10 and AutoCannon-20 shoot high explosive shells that cause hit unit to shake violently, disturbing their aim (screenshake)
  • Heavy Kinetic damage does additional damage against air units, but the mid-short range somewhat limits their use as effective AA


Standard Autocannon

The first Standard AutoCannon was an AC5 introduced in 2250 by the Terran Alliance, and would be followed by the AC2 in 2300 (Terran Alliance), the AC10 in 2500 (Terran Hegemony), and the AC20 in 2500 (Lyran Commonwealth). The weapons represent a wide range of heavy ballistic cannon with varying rates-of-fire and calibers ranging from 30 millimeters at the lightest up to larger than 200 millimeters.

Among the Clans the Standard AutoCannon was phased out sometime around 2820 in favor of the newer Lubalin Ballistics-X AutoCannons and Ultra AutoCannons. Even in the Inner Sphere the standard AC only continues to remain in use due to lower cost of production and the introduction of specialty munitions which are usable only by these weapons.

BattleTech reference


The following Inner Sphere assets equip Standard AutoCannons:

Asset Type Faction Tons AC2 AC5 AC10 AC20
Commando B Mech IS 25 1
Commando G Mech IS 25 2
Osiris G Mech IS 30 2
Raven F Mech IS 35 2
Chimera F Mech IS 40 1
HollanderII D Mech IS 45 4
Uziel C Mech IS 50 1
Uziel E Mech IS 50 2
Bushwacker G Mech IS 55 1
Rifleman A Mech IS 60 4
Rifleman F Mech IS 60 2
Catapult E Mech IS 65 4
Avatar D Mech IS 70 1
Warhammer G Mech IS 70 4
Marauder Prime Mech IS 75 2
Marauder G Mech IS 75 1
Thanatos C Mech IS 75 1
Mauler E Mech IS 90 4
Sunder Prime Mech IS 90 1
Atlas C Mech IS 100 2
Atlas D Mech IS 100 1
Fafnir F Mech IS 100 2
Chevalier B Vehicle IS 35 2
Chevalier E Vehicle IS 35 1
Goblin C Vehicle IS 45 2
Goblin E Vehicle IS 45 1
Rommel Prime Vehicle IS 65 1
Demolisher Prime Vehicle IS 80 2
Demolisher F Vehicle IS 80 2
Partisan Prime Vehicle IS 80 4
Partisan D Vehicle IS 80 1
All stats are current as of release 0.13.3