Extended LRM-20

(Redirected from ELRM-20)
Extended LRM-20
Production information
Type Missile Weapon
Tech Base Inner Sphere
Year Availability 3054[2]
Technical specifications
Heat 12
Damage 1/Missile
Minimum Range 10
Short Range 1-12
Medium Range 13-22
Long Range 23-38
Extreme Range 39-44
Tons 18
Critical Slots 8
Ammo Per Ton 4
Cost (unloaded) 500,000
Ammo Cost (per ton) 35,000
BV (1.0)  ???
BV (2.0) 268 launcher/34 ammunition[3]


The Extended LRM (ELRM) system was designed by engineers in the Federated Commonwealth to offset the incredible range advantage of most Clan weapons. The ELRM pairs a standard LRM to a booster system that gives the missile more fuel, and thus, more range. Offsetting the range advantage is the fact that the minimum range of the weapon is increased by over 50%.

The ELRM cannot use the improved guidance systems like the Artemis IV or Narc Missile Beacon. Special munitions are not available for the ELRM. If a rack of ELRMs fires at a target inside the minimum range, half the missiles will not arm.[4]

By 3080, the all Extended LRM-20 launchers would enter limited production and start to appear on more technologically advanced combat units.[5]


ELRMs are manufactured at the following facilities:[6]

Brand Planet Company
Unknown New Avalon Achernar BattleMechs
Unknown Coventry Coventry Metal Works
Unknown Skye Cyclops Incorporated
Unknown Tharkad TharHes Industries


  1. Technical Readout: Prototypes, p. 207 JIHAD TECHNOLOGY ADVANCEMENT TABLE - ELRM launchers progression from Experimental to Advance Technology.
  2. Tactical Operations, p. 409
  3. Tactical Operations, p. 383
  4. Tactical Operations, p. 327
  5. Technical Readout: Prototypes, p. 207 JIHAD TECHNOLOGY ADVANCEMENT TABLE - All ELRMs move from Experimental Tech to Advance Tech. Advance tech is limited production.
  6. Tactical Handbook, p. 58