Rotary AutoCannons

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Rotary AutoCannons, or RACs, are weapons which produce rates of fire beyond that of even Ultra AutoCannons, resulting in weapons with the highest rate-of-fire in the game.


A pre-0.6.0 Uziel B shows off the RAC2.

The Rotary AutoCannon make use of multiple barrels, allowing for a higher rate of fire by giving each individual barrel some time to cool down, resulting in a (relatively) high caliber gatling gun. In addition to their high rate of fire RACs have slightly improved damage compared to their Standard AutoCannon or Ultra AutoCannon counterparts, although this does come with a serious reduction in weapon range. Even with their multiple barrels RACs are prone to overheating under sustained fire. In addition the RAC2 and RAC5 both have a nasty habit of jamming during intense use which thankfully requires no trip to a repair bay to correct.

Only Inner Sphere Vehicles and BattleMechs may mount the Rotary AutoCannon.

Weapon Stats

Weapon Max Range Dmg Drop
Dmg Drop
Damage/Shot Damage
Splash Radius Shots
Ammo cost
RAC2 1000m 800m 0.05 19 Kinetic --- 589 (1080)* 224 410 1.1 4s 6s 600 250
RAC5 700m 650m 0.43 65 315 (600)* 411 780 2.6 5s 200 450
Air RAC2 1000m 800m 0.05 19 Light Kinetic --- 589 (1080)* 261 479 1.3 4s 6s 600 250
Air RAC5 860m --- --- 80 Kinetic‑air 1.5m 245 (600)* 392 960 3 9s 200 450
*Max rate of fire All stats are current as of release 0.11.2

RAC2 and RAC5

The astounding rate-of-fire of the Rotary AutoCannon-2 and Rotary AutoCannon-5 make them especially effective in the anti-air role or against enemy Battle Armor. They excel at the destruction of softer targets, and thanks to their high damage-per-second perform acceptably against heavier targets (the RAC5 more so than the RAC2). Unfortunately their reduced range makes means that they typically end up in the range brackets of heavier AutoCannon, such as the UAC10 or the LBX20. In addition, their rapid ammunition consumption and tendency to jam during intense firing make them somewhat poorly suited for short-range slugging matches.


Rotary AutoCannon

The Rotary AutoCannon was developed by the New Avalon Institute of Science in 3062 and is both bulkier and heavier than Ultra-class AutoCannons. In addition, the expense of construction and inability to make use of specialty munitions have prevented it from being developed for the heavier AutoCannon calibers. Offsetting these factors, however, are the RAC's ability to fire at up to six times the rate of a Standard AutoCannon. While the weapon is prone to jamming at higher rates of fire one significant improvement over Ultra AutoCannon is the ability to clear the jam in the heat of battle.

Although initially developed and produced by the Federated Commonwealth, the FedCom Civil War saw the RAC quickly disseminate to other Successor States. Currently the Clans have yet to develop an RAC of their own.

BattleTech reference


The following Inner Sphere assets equip Rotary AutoCannons:

All lists are current as of release 0.11.2

See Also