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Ferro-fibrous armor

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Ferro-fibrous armor


Ferro-fibrous armor (FF) is a special type of protective covering used by vehicles and BattleMechs. Utilizing a weave of ferro-steel, ferro-titanium, and diamond weave fibers which boosts the tensile strength of the plating,[1][2] it provides more protection per ton than standard armor (12% for Inner Sphere FF, 20% for Clan FF), but takes up more space on the 'Mech or vehicle (14 critical slots for Inner Sphere, 16 for prototype Inner Sphere, and 7 for Clan 'Mechs; two slots for Inner Sphere vehicles (three for prototype IS), one for Clan). The maximum amount of protection is not changed; merely the weight of armor required to achieve that level of protection. For a unit which already has maximum armor protection, it is therefore considered a weight-saving measure, at the cost of critical space. The weight savings for Endo Steel are greater than those saved by ferro-fibrous armor, but it is more costly and obviously more difficult to repair or add as an upgrade to a 'Mech.

First developed by the Terran Hegemony as a prototype in 2557[3] and mass produced in 2571,[1] ferro-fibrous armor was lost to the Inner Sphere during the Succession Wars. The Draconis Combine was the first to recreate it in 3040.[1] Later, the Free Worlds League and Lyran Alliance would develop light and heavy versions of ferro-fibrous armor.[1]


Standard ferro-fibrous armor is manufactured on the following planets:

Brand Planet Company Used by References
Arcadia Compound Delta VII Arcadia Arcadia BattleMech Plant CM-T15 Highlander IIC, Mongrel (Grendel) [4][5][6]
ArcShield Max III Advanced Betelgeuse Aldis Industries Behemoth II [7]
ArcShield Maxi IV Panpour Jalastar Aerospace Typhoon Urban Assault Vehicle [8]
Compound Alpha Huntress Abysmal Manufacturing Complex Horned Owl [9]
Compound Alpha Irece Barcella Beta Sekhmet, Cizin [10][11]
Advanced Compound Beta Irece Barcella Beta Joust [12]
Compound 2110 Irece Barcella Beta Odin [13]
Compound CL20 Tamaron Ashton 'Mech Production Complex Rabid Coyote [14]
Compound H17 Arcadia Arcadia BattleMech Plant CM-03 Mist Lynx [15]
Compound H17 Irece Barcella Beta Shadow Cat [16][17]
Compound H18 Babylon Babylon MechWorks V Uller [18][19]
Compound SJ6CW Arcadia Arcadia BattleMech Plant CM-03 Mad Dog [17]
Durallex Super Medium Quentin Independence Weaponry Shipped to Luthien for Wolf Trap, TSH-7S Tai-Sho, TSN-1C Tessen, and JagerMech III [20][21][22][23]
Durallex Super Medium Hesperus II Defiance Industries Hatchetman [24]
Durallex Super Medium Taurus Taurus Territorial Industries Marshal [25]
Forging AM15 Twycross Trellshire Heavy Industries Phoenix Hawk IIC, Kite, Cardinal [26][27][28]
Forging AM15 Ingersoll Manufacturing Plant SFF-NG1 Kite [27]
Forging AM15 Shimonita Manufacturing Plant SFF-SH2 Kite [27]
Forging X85 Huntress Phan Industrial Complex Warhawk (Masakari) [29]
Glasgow Limited Primo Hesperus II Defiance Industries Zeus [24]
Jolassa-328 Umka Kerr-McGinniss Hermes,Thunderbolt [30]
Jolassa-328 Abadan Adam Tech Industries HVC-P6 Havoc [31]
Kallon FWL Special Gibson Gibson Federated BattleMechs Locust, Buccaneer [32][33]
Kallon FWL Special Tematagi Nimakachi Fusion Products Limited Spider, Venom [34][35]
Kallon Unity Weave Thermopolis Kallon Industries Shipped to Federated Commonwealth for Axman and Wolverine [36]
Kallon Unity Weave Kirklin Kallon Industries Challenger X [37]
Kallon Unity Weave Talon Kallon Industries JagerMech, JagerMech III [38][39]
Kallon Unity Weave Loyalty Kallon Industries Partisan AA Vehicle [40]
Krupp 155 Terra Krupp Armament Works Ostscout 11J [41]
Krupp 200 Terra Krupp Armament Works Nyx [42]
Krupp Draco-100 Terra Krupp Armament Works Pinto [43]
Lexington Ltd. High Grade Richvale Quikscell Company Ontos [44]
Lexington Ltd. High Grade Coventry Coventry Metal Works Commando, Vulcan, Hussar, STO-4A Stiletto, STO-6S Stiletto, Blitzkrieg, Hollander [45][45][46][47][48][49][50]
Mk. VI Arcadia Arcadia BattleMech Plant CM-T4 Hellfire [51]
New Samarkand Royal New Samarkand New Samarkand Metals Shipped to Luthien for Jenner, Charger and Mauler [52]
Norse-34 Loxley Blue Shot Weapons Starslayer [53]
Protec 12 Al Na'ir Scarborough Manufacturers Pegasus, Schiltron [54][55]
StarGuard 3056 Terra Blankenburg Technologies Grim Reaper [56]
StarGuard CIV (w/CASE) Kallon Weapon Industries Wernke HNT-171 Hornet [57]
StarSlab-1 Ferro-Fibrous Ruchbah Michaelson Heavy Industries Sprint [58][59]
StarSlab-1 Ferro-Fibrous Canopus IV Majesty Metals and Manufacturing Condor [60]
StarSlab-1 Ferro-Fibrous Sevon Alliance Mining and Geology Locust, Stinger, Wasp [61]
StarSlab-4 Hesperus II Defiance Industries Gürteltier [62]
StarSlab-9.5 Mk II Pandora Red Devil Industries Condor [63][64]


  • This article refers to a common object and addresses the object as a common noun. The preferred term is "ferro-fibrous armor" (except on section titles & table headings, where "Ferro-fibrous Armor" is favored).


  1. 1.0 1.1 1.2 1.3 TechManual, p. 205, "Armor - Ferro-Fibrous"
  2. MechWarrior 4: Vengeance (Resource)
  3. Interstellar Operations, p. 72, "Ferro-Fibrous Armor-P"
  4. Technical Readout: Clan Invasion, p. 32, "Grendel"
  5. Technical Readout: 3060, p. 184, "Produced Highlander IIC Components"
  6. Technical Readout: 3058 Upgrade, p. 168, "Produced Grendel Omni Components"
  7. Technical Readout: 3145 Capellan Confederation, p. 24, "Behemoth II"
  8. Technical Readout: 3058 Upgrades, p. 106, "Typhoon"
  9. Technical Readout: 3055 Upgrade, p. 110 - "Mech Components"
  10. Technical Readout: 3145 Draconis Combine, p. 22, "Produced Sekhmet Components"
  11. Technical Readout: 3145 Draconis Combine, p. 18, "Produced Cizin Components"
  12. Technical Readout: 3085, p. 136, "Produced Joust BE700 Vehicle Components"
  13. Technical Readout: 3060, p. 38, "Vehicle Components"
  14. Technical Readout: 3067, p. 118, "Mech Components"
  15. Technical Readout: 3050 Upgrade, p. 116, "OmniMech Components"
  16. Technical Readout: 3058 Upgrade, p. 170, "OmniMech Components"
  17. 17.0 17.1 Technical Readout: Clan Invasion, p. 12, "Fire Falcon"
  18. Technical Readout: 3050 Upgrade, p. 118, "OmniMech Components"
  19. Technical Readout: Clan Invasion, p. 20, "Uller"
  20. Objective Raids, p. 105, "Produced Independence Weaponry Components"
  21. Technical Readout: 3060 (Reprint), p. 122, "TSH-7STai-sho"
  22. Technical Readout: 3067 (Reprint), p. 68, "TSN-1C Tessen"
  23. Technical Readout: 3060, p. 110, "JagerMech III"
  24. 24.0 24.1 Objective Raids, p. 76: "Produced Defiance Industries Components on Hesperus II"
  25. Technical Readout: 3060, p. 100, "Produced Marshal 'Mech Components"
  26. Technical Readout: 3085, p. 280, "Produced Phoenix Hawk IIC 7 Components"
  27. 27.0 27.1 27.2 Technical Readout: 3145 Mercenaries, p. 16, "Kite Reconnaissance Vehicle"
  28. Technical Readout: 3145 Mercenaries, p. 18, "Cardinal Transport"
  29. Technical Readout: 3050 Upgrade, p. 140, "Produced Warhawk Components on Huntress"
  30. Objective Raids, p. 138, "Produced Kerr-McGuinness Components"
  31. Technical Readout: 3145 Free Worlds League, p. 24, "Produced Havoc Components"
  32. Objective Raids, p. 124, "Produced Gibson BattleMech Components"
  33. Technical Readout: 3060, p. 98, "Buccaneer 'Mech Profile"
  34. Objective Raids, p. 136, "Produced Nimakachi Fusion Components on Tematagi"
  35. Technical Readout: 3055 Upgrade, p. 26, "Produced Venom Components"
  36. Objective Raids, p. 137, "Produced Kallon Industries Components on Asunction"
  37. Technical Readout: 3058 Upgrade, p. 114, "Produced Challenger X Components on Kirklin"
  38. Objective Raids, p. 91, "Produced Kallon Industries Components on Talon"
  39. Technical Readout: 3060, p. 112, "Produced JagerMech III Components on Talon"
  40. Technical Readout: 3145 Free Worlds League, p. 16, "Partisan AA Vehicle"
  41. , "Produced Ostscout 11J Components"
  42. Technical Readout: 3085, p. 62, Produced Nyx Components
  43. Technical Readout: 3060, p. 16, "Produced Pinto VTOL Components"
  44. Technical Readout: Prototypes, p. 62, "Produced Ontos Components"
  45. 45.0 45.1 Objective Raids, p. 80, Produced Coventry Metal Works Components
  46. Technical Readout: 3050 Upgrade, p. 192, "Produced Hussar Components"
  47. Technical Readout: 3067, p. 56, "Produced Stiletto Components"
  48. Technical Readout: Prototypes, p. 102, "Produced STO-6S Stiletto Components"
  49. Technical Readout: 3060, p. 94, "Produced Blitzkrieg Components"
  50. Technical Readout: 3055 Upgrade, p. 24, "Produced Hollander Components"
  51. Technical Readout: 3067, p. 120, "Produced Hellfire 'Mech Components"
  52. Objective Raids, p. 109, "Produced New Samarkand Metals Components"
  53. Technical Readout: 3058 Upgrade, p. 210, "Produced Blue Shot Weapons Components"
  54. Technical Readout: 3058, p. 34 "Pegasus"
  55. Technical Readout: 3060 Revised, p. 28, "Produced Schiltron Components"
  56. Technical Readout: 3055 Upgrade, p. 44, "Produced Grim Reaper Components"
  57. Technical Readout: 3050, pp. 50-51, "HNT-171 Hornet"
  58. Technical Readout: 3058 , p. 8, "Produced Sprint Components"
  59. Technical Readout: 3058 Upgrade, p. 54, "Produced Sprint Components"
  60. Objective Raids, p. 151, "Produced Locust Components"
  61. Objective Raids, p.155 "Produced Alliance Mining and Geology Components"
  62. Technical Readout: 3085, p. 50: "Produced Gürteltier Components on Hesperus II"
  63. Objective Raids, p. 56, "Produced Red Devil Industries Components"
  64. Technical Readout: 3026 Revised, p. 52, "Produced Condor Vehicle Components"