This article is about the BattleMech. For other uses, see Longbow (disambiguation).

Production information
Manufacturer StarCorps Industries
Production Year 2610[1]
Model LGB-7Q
Class Assault
Introduced 2480 [2]
Cost 7,408,325 C-bills
Technical specifications
Mass 85 tons
Chassis StarCorp 100
Armor StarSlab/9.5 Mk II
Engine Strand 255
Communications System O/P 3000 COMSET, Irian TelStar
Targeting Tracking System AntiAir Flak Systems-1, Octagon Tartrac Systems C
Heat Sinks 22
Speed 54.0 km/h
BV (1.0) 1,376[3][4]
BV (2.0) 1,618[5]


The Longbow, introduced in 2480 as the LGB-0C Longbow, has seen service in the armies of the Inner Sphere since the days of the Star League and is one of the most well-known fire support 'Mechs in existence. The Longbow is a massive BattleMech weighing in at 85 tons and is able to move at a top speed of 54.0 km/h, thanks to a Strand 255 fusion engine. The Longbow is protected by fourteen and a half tons of armor. Some have criticized the design for its lack of CASE - making an otherwise rugged 'Mech vulnerable to a loss by an ammunition explosion. As a fire-support 'Mech though, the Longbow is a trusted and reliable machine that can be counted on to carry out the mission it is designed for.

Weapons and Equipment[edit]

The primary weapons on the Longbow are its LRM launchers. The Longbow carries four launchers in all. The largest are a pair of Holly LRM-20s which have the firepower of two Delta Dart LRM-5s added to them. Combined, the launchers can put a devastating barrage of up to fifty missiles at ranges of six hundred and thirty meters. To protect itself in close combat, the Longbow has two Ceres Arms Medium Lasers.


  • LGB-0C 
    The original Longbow built in 2480, this Free Worlds League design carried twin LRM-20s each with three tons of ammunition, supported by two Medium Lasers and a Small Laser. The Primitive Technology used limited the design's top speed to 54km/h, but this was deemed acceptable for a fire support unit. The location of the LRM launchers in the arms allowed it to fire in a wider arc, a feature prized by pilots. The Primitive Armor provided some protection, but many felt it was too thin. This design would go on to become one of the most popular and widely distributed as the manufacturer, Lockenburg-Holly Industries, merged with several other manufacturers to form StarCorps Industries.[2]
  • LGB-0W 
    To add some speed to the Longbow, the OW variant removes two Medium Lasers and five and a half tons of armor. This allowed the Strand 255 Fusion Engine to be replaced with a larger Strand 340, increasing the top speed of the Longbow to 64 km/h, allowing the 'Mech to keep up with most heavy 'Mechs. The LGB-0W used the O/P 3000 COMSET communications system and the Octagon Tartrac System C targeting and tracking system.[6] BV (1.0) = 1,034[7][8], BV (2.0) = 1,377[9][10]
  • LGB-7V 
    The 7V variant of the Longbow upgrades the design to more modern specifications. The 'Mech is powered by an XL engine that weighs half as much as the original engine. The 'Mech also removes the two LRM-5 launchers and adds Artemis IV to the LRM-20 launchers, and CASE for added protection. For close combat, the 7V has 5 Medium Pulse Lasers. To add a little more long range firepower, the 7V has also has an ER Large Laser. BV (1.0) = 1,366[11], BV (2.0) = 1,816[12]
  • LGB-8V 
    This variant was introduced during the Jihad. By removing all the standard weaponry, designers were able to install two Arrow IV launchers and eight tons of ammunition. This variant also carries a single pulse laser for defense, but the artillery support it can provide is usually adequate to deter opponents.[13] BV (2.0) = 1,808[14]
  • LGB-12C 
    A recent upgrade of the Longbow, the 12C variant is designed to maximize the 'Mech's fire support capabilities. The 'Mech has two LRM-20 launchers and two LRM-15 launchers, giving it an incredible bombardment capability and is capable of firing 40% more missiles down range than the base model. The 'Mech has three ER Small Lasers for close combat. The 12C variant is capable of doing this through the use of an XL engine that saves a great deal of weight. BV (1.0) = 1,342[15][16][17], BV (2.0) = 1,686[18]
  • LGB-12R 
    This version of the Longbow carries a quartet of LRM-15 launchers, backed up by an ER Large Laser and ER Medium Laser. CASE protects the ammunition bins, while three jump jets allow the 12R to cover 90 meters at a time. To make room for this equipment, a Light Fusion Engine is used. BV (2.0) = 1,979[19]
  • LGB-13C 
    This upgrade of the 12C mounts six Doombud MML 7s, each of which is tied to an Artemis IV FCS. Six tons of CASE-protected ammunition supply these launchers. Three Diverse Optics ER Small Lasers provide paltry backup, though massed short-range missiles coming from the Multi-Missile Launchers are sure to deter smaller 'Mechs. A larger engine brings the 13C to a speed that matches that of the OW. BV (1.0) = ??, BV (2.0) = 1,397[20]
  • LGB-13NAIS 
    This variant removes all missile launchers from the Longbow and uses a standard Fusion Engine, though it does use an Endo Steel frame to save weight. Each arm mounts three Light Autocannon/5s that can make use of special munitions produced by the Federated Suns. To ensure that it can mount such ammunition, seven tons are alloted to the ammunition bins. A Guardian ECM Suite protects it from enemy electronics, while a C3 Slave uses targeting data from other C3 equipped units to improve its accuracy. The 13NAIS mounts on ER Small Laser and a pair of ER Medium Lasers, along with a pair of B-Pods for use against battle armor. BV (1.0) = ??, BV (2.0) = 1806[21]
  • LGB-14C 
    This upgrade of the 12C uses six Doombud MML 9s with ten tons of ammunition supplying them. For backup, it uses three ER Medium Lasers. It also mounts an additional ton and a half of armor, though it has two fewer double heat sinks. Pilots are cramped into a Small Cockpit, but seem to accept the additional firepower. BV (1.0) = ??, BV (2.0) = 1,421[22]
  • LGB-14C2 
    This upgrade of the 14C removes two of the ER Medium Lasers and replaces them with a Boosted C3 Slave unit. It is otherwise identical to the 14C. BV (2.0) = 1,291[23]

Notable Pilots[edit]

Design Quirks[edit]

The LGB-OC Longbow variant is subject to the following Design Quirks:[2]



  1. MUL online date for the LGB-7Q Longbow
  2. 2.0 2.1 2.2 Experimental Technical Readout: Primitives, Volume 3, p. 8
  3. Technical Readout: 3058 Upgrade, p. 153
  4. Record Sheets: 3058 Upgrades, p. 312
  5. Record Sheets: 3058 Unabridged (Inner Sphere), p. 287
  6. Technical Readout: 3039, p. 301, "LGB-0W Longbow"
  7. Combat Operations, p. 121
  8. Record Sheets: 3058 Upgrades, p. 315
  9. Technical Readout: 3039, p. 301, "LGB-OW Longbow"
  10. Record Sheets: 3039 Unabridged, p. 499
  11. Record Sheets: 3058 Upgrades, p. 313
  12. Record Sheets: 3058 Unabridged (Inner Sphere), p. 288
  13. Technical Readout: 3085, p. 191
  14. Record Sheets: 3085 Unabridged — Old is the New New, p. 111
  15. Technical Readout: Project Phoenix, p. 55
  16. Record Sheets: 3058 Upgrades, p. 314
  17. Record Sheets: Upgrades, p. 137
  18. Record Sheets: 3085 Unabridged — Project Phoenix, p. 215
  19. Record Sheets: 3085 Unabridged — Project Phoenix, p. 216
  20. Record Sheets: 3085 Unabridged — Project Phoenix, p. 217
  21. Record Sheets: 3085 Unabridged — Project Phoenix, p. 218
  22. Record Sheets: 3085 Unabridged — Project Phoenix, p. 219
  23. Record Sheets: 3145 New Tech, New Upgrades, p. 171
  24. Sorenson's Sabres (scenario pack), p. 20, "Cederik Sveinson" - Notable Longbow pilot.