Medium Range Missiles

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Medium Range Missiles, or MRMs for short, are a unique weapon system capable of saturating an area with unguided missiles.


Like SRMs, Medium Range Missile rack is unable to lock on targets. Short range effectiveness is significantly reduced due to the missiles firing out in a "shotgun" pattern after initial launch, as well as the 65 meter minimum range.

While the damage dealt by individual missiles is slightly less than that of LRM's, and their unguided nature make aiming more difficult, may give the impression of a sub-par weapon system MRMs make up for it through sheer weight of fire. Even the smallest MRM rack fires off 10 missiles at once and with so many missiles hitting the enemy cockpit will be shaken quite violently. In addition, their tendency to spread when fired enables them to saturate an area, helping to ensure that at least some hits are scored and making the weapon especially effective against targets clustered together closely. These same factors do make the missiles less effective against fast moving targets, or when moving laterally when the missiles launch.

Only Inner Sphere units have access to MRMs.

Weapon Stats

Weapon Min Range Max Range Splash Damage/Shot Damage
Sec. Splash
Damage Type
Splash Radius
Ammo cost
MRM10 65m 640m 10 x 82 Missile 10 x 82 Frag 1.5m / 5m 11.3 158 400 46 240 1050
MRM20 20 x 82 20 x 82 8.6 239 92
MRM30 30 x 82 30 x 82 6.9 288 138
MRM40 40 x 82 40 x 82 6 335 185
Air MRM10 20m 700m 10 x 82 Missile 10 x 82 Frag 1.5m / 5m 9.2 129 500 46 240 250
Air MRM20 20 x 82 20 x 82 8.6 239 92
Air MRM30 30 x 82 30 x 82 8 335 138
Air MRM40 40 x 82 40 x 82 7.5 418 185
All stats are current as of release 0.11.4

Gameplay & Hints

Sometimes it can be difficult to find areas that allows a unit to take full advantage of an LRM or ELRM rack's range, in these situations, MRM's can prove to be more suitable choice. Their lack of a ballistic trajectory after launch makes them significantly more effective in close quarters fights while still having a range edge over dedicated short range weapons. Near the maximum range, acceptable effectiveness can be difficult to achieve against faster and smaller targets.


Medium Range Missiles were introduced by the Draconis Combine's Luthien Armor Works in 3058. Their effort was based around a "dead-fire" concept and were intended to deliver smaller and less expensive missiles aimed at area saturation fire. To this end the missiles completely lacked any sort of guidance system, a huge step backward compared to other systems, which enabled them to make use of lighter missiles and launchers. Initially the weapon was spurned as something for green cadets, however it has since caught on in regular military units among Successor States and mercenaries.

BattleTech reference


The following Inner Sphere assets equip MRMs:

Air MRM10 MRM10 Air MRM20 MRM20 Air MRM30 MRM30 Air MRM40 MRM40
All lists are current as of release 0.11.4