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. Pioneered by the Terran Hegemony in the mid-twenty-sixth century, early prototypes of the armor appeared as early as 2557.[1] Standard ferro-fibrous armor was available by 2571[2][1] shortly after the birth of the Star League, prompting First Lord Ian Cameron to make it the first advanced Star League-era technology the Hegemony would share with the rest of the Inner Sphere.[3]

Utilizing the same layers as standard armor, ferro-fibrous increases its protection by adding a diamond weave to the outer aligned-crystal steel layer,[4]. This increase over standard is 12% for Inner Sphere FF and 20% for Clan FF. However, ferro-fibrous 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.[citation needed][3][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.[4] Later, the Free Worlds League and Lyran Alliance would develop light and heavy versions of ferro-fibrous armor.[4]


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) [5][6][7]
ArcShield Max III Advanced Betelgeuse Aldis Industries Behemoth II [8]
ArcShield Maxi IV Panpour Jalastar Aerospace Typhoon Urban Assault Vehicle [9]
Compound Alpha Huntress Abysmal Manufacturing Complex Horned Owl [10]
Compound Alpha Irece Barcella Beta Sekhmet, Cizin [11][12]
Advanced Compound Beta Irece Barcella Beta Joust [13]
Compound 2110 Irece Barcella Beta Odin [14]
Compound CL20 Tamaron Ashton 'Mech Production Complex Rabid Coyote [15]
Compound H17 Arcadia Arcadia BattleMech Plant CM-03 Mist Lynx [16]
Compound H17 Irece Barcella Beta Shadow Cat [17][18]
Compound H18 Babylon Babylon MechWorks V Uller [19][20]
Compound SJ6CW Arcadia Arcadia BattleMech Plant CM-03 Mad Dog [18]
Durallex Super Medium Quentin Independence Weaponry Shipped to Luthien for Wolf Trap, TSH-7S Tai-sho, TSN-1C Tessen, and JagerMech III [21][22][23][24]
Durallex Super Medium Hesperus II Defiance Industries Hatchetman [25]
Durallex Super Medium Taurus Taurus Territorial Industries Marshal [26]
Forging AM15 Twycross Trellshire Heavy Industries Phoenix Hawk IIC, Kite, Cardinal [27][28][29]
Forging AM15 Ingersoll Manufacturing Plant SFF-NG1 Kite [28]
Forging AM15 Shimonita Manufacturing Plant SFF-SH2 Kite [28]
Forging X85 Huntress Phan Industrial Complex Warhawk (Masakari) [30]
Glasgow Limited Primo Hesperus II Defiance Industries Zeus [25]
Jolassa-328 Umka Kerr-McGinniss Hermes, Thunderbolt [31]
Jolassa-328 Abadan Adam Tech Industries HVC-P6 Havoc [32]
Kallon FWL Special Gibson Gibson Federated BattleMechs Locust, Buccaneer [33][34]
Kallon FWL Special Tematagi Nimakachi Fusion Products Limited Spider, Venom [35][36]
Kallon Unity Weave Thermopolis Kallon Industries Shipped to Federated Commonwealth for Axman and Wolverine [37]
Kallon Unity Weave Kirklin Kallon Industries Challenger X [38]
Kallon Unity Weave Talon Kallon Industries JagerMech, JagerMech III [39][40]
Kallon Unity Weave Loyalty Kallon Industries Partisan AA Vehicle [41]
Krupp 155 Terra Krupp Armament Works Ostscout 11J [42]
Krupp 200 Terra Krupp Armament Works Nyx [43]
Krupp Draco-100 Terra Krupp Armament Works Pinto [44]
Lexington Ltd. High Grade Richvale Quikscell Company Ontos [45]
Lexington Ltd. High Grade Coventry Coventry Metal Works Commando, Vulcan, Hussar, STO-4A Stiletto, STO-6S Stiletto, Blitzkrieg, Hollander [46][46][47][48][49][50][51]
Mk. VI Arcadia Arcadia BattleMech Plant CM-T4 Hellfire [52]
New Samarkand Royal New Samarkand New Samarkand Metals Shipped to Luthien for Jenner, Charger and Mauler [53]
Norse-34 Loxley Blue Shot Weapons Starslayer [54]
Protec 12 Al Na'ir Scarborough Manufacturers Pegasus, Schiltron [55][56]
StarGuard 3056 Terra Blankenburg Technologies Grim Reaper [57]
StarGuard CIV (w/CASE) Kallon Weapon Industries Wernke HNT-171 Hornet [58]
StarSlab-1 Ferro-Fibrous Ruchbah Michaelson Heavy Industries Sprint [59][60]
StarSlab-1 Ferro-Fibrous Canopus IV Majesty Metals and Manufacturing Condor [61]
StarSlab-1 Ferro-Fibrous Sevon Alliance Mining and Geology Locust, Stinger, Wasp [62]
StarSlab-4 Hesperus II Defiance Industries Gürteltier [63]
StarSlab-9.5 Mk II Pandora Red Devil Industries Condor [64][65]
Strasbourg Armaments Type 4 Ferro-Fibrous Terra Martinson Armaments LGH-4W Lightray,
LGH-6W Lightray,
LGH-7W Lightray


  • 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 Interstellar Operations, p. 72: "Ferro-Fibrous Armor (FF-P)"
  2. TechManual, p. 205: "Ferro-Fibrous/Ferro-Aluminum Armor"
  3. 3.0 3.1 Historical: Reunification War, p. 179: "Ferro-Fibrous Armor (FF-P)"
  4. 4.0 4.1 4.2 TechManual, p. 34: "New Armors - Ferro-Fibrous"
  5. Technical Readout: Clan Invasion, p. 32: "Grendel"
  6. Technical Readout: 3060, p. 184: "Produced Highlander IIC Components"
  7. Technical Readout: 3058 Upgrade, p. 168: "Produced Grendel Omni Components"
  8. Technical Readout: 3145 Capellan Confederation, p. 24: "Behemoth II"
  9. Technical Readout: 3058 Upgrades, p. 106: "Typhoon"
  10. Technical Readout: 3055 Upgrade, p. 110: "Mech Components"
  11. Technical Readout: 3145 Draconis Combine, p. 22: "Produced Sekhmet Components"
  12. Technical Readout: 3145 Draconis Combine, p. 18: "Produced Cizin Components"
  13. Technical Readout: 3085, p. 136: "Produced Joust BE700 Vehicle Components"
  14. Technical Readout: 3060, p. 38: "Vehicle Components"
  15. Technical Readout: 3067, p. 118: "Mech Components"
  16. Technical Readout: 3050 Upgrade, p. 116: "OmniMech Components"
  17. Technical Readout: 3058 Upgrade, p. 170: "OmniMech Components"
  18. 18.0 18.1 Technical Readout: Clan Invasion, p. 12: "Fire Falcon"
  19. Technical Readout: 3050 Upgrade, p. 118: "OmniMech Components"
  20. Technical Readout: Clan Invasion, p. 20: "Uller"
  21. Objective Raids, p. 105: "Produced Independence Weaponry Components"
  22. Technical Readout: 3060 (Reprint), p. 122: "TSH-7S Tai-sho"
  23. Technical Readout: 3067 (Reprint), p. 68: "TSN-1C Tessen"
  24. Technical Readout: 3060, p. 110: "JagerMech III"
  25. 25.0 25.1 Objective Raids, p. 76: "Produced Defiance Industries Components on Hesperus II"
  26. Technical Readout: 3060, p. 100: "Produced Marshal 'Mech Components"
  27. Technical Readout: 3085, p. 280: "Produced Phoenix Hawk IIC 7 Components"
  28. 28.0 28.1 28.2 Technical Readout: 3145 Mercenaries, p. 16: "Kite Reconnaissance Vehicle"
  29. Technical Readout: 3145 Mercenaries, p. 18: "Cardinal Transport"
  30. Technical Readout: 3050 Upgrade, p. 140: "Produced Warhawk Components on Huntress"
  31. Objective Raids, p. 138: "Produced Kerr-McGuinness Components"
  32. Technical Readout: 3145 Free Worlds League, p. 24: "Produced Havoc Components"
  33. Objective Raids, p. 124: "Produced Gibson BattleMech Components"
  34. Technical Readout: 3060, p. 98: "Buccaneer 'Mech Profile"
  35. Objective Raids, p. 136: "Produced Nimakachi Fusion Components on Tematagi"
  36. Technical Readout: 3055 Upgrade, p. 26: "Produced Venom Components"
  37. Objective Raids, p. 137: "Produced Kallon Industries Components on Asuncion"
  38. Technical Readout: 3058 Upgrade, p. 114: "Produced Challenger X Components on Kirklin"
  39. Objective Raids, p. 91: "Produced Kallon Industries Components on Talon"
  40. Technical Readout: 3060, p. 112: "Produced JagerMech III Components on Talon"
  41. Technical Readout: 3145 Free Worlds League, p. 16: "Partisan AA Vehicle"
  42. : "Produced Ostscout 11J Components"
  43. Technical Readout: 3085, p. 62: Produced Nyx Components
  44. Technical Readout: 3060, p. 16: "Produced Pinto VTOL Components"
  45. Technical Readout: Prototypes, p. 62: "Produced Ontos Components"
  46. 46.0 46.1 Objective Raids, p. 80: Produced Coventry Metal Works Components
  47. Technical Readout: 3050 Upgrade, p. 192: "Produced Hussar Components"
  48. Technical Readout: 3067, p. 56: "Produced Stiletto Components"
  49. Technical Readout: Prototypes, p. 102: "Produced STO-6S Stiletto Components"
  50. Technical Readout: 3060, p. 94: "Produced Blitzkrieg Components"
  51. Technical Readout: 3055 Upgrade, p. 24: "Produced Hollander Components"
  52. Technical Readout: 3067, p. 120: "Produced Hellfire 'Mech Components"
  53. Objective Raids, p. 109: "Produced New Samarkand Metals Components"
  54. Technical Readout: 3058 Upgrade, p. 210: "Produced Blue Shot Weapons Components"
  55. Technical Readout: 3058, p. 34: "Pegasus"
  56. Technical Readout: 3060 Revised, p. 28: "Produced Schiltron Components"
  57. Technical Readout: 3055 Upgrade, p. 44: "Produced Grim Reaper Components"
  58. Technical Readout: 3050, pp. 50–51: "HNT-171 Hornet"
  59. Technical Readout: 3058, p. 8: "Produced Sprint Components"
  60. Technical Readout: 3058 Upgrade, p. 54: "Produced Sprint Components"
  61. Objective Raids, p. 151: "Produced Locust Components"
  62. Objective Raids, p. 155: "Produced Alliance Mining and Geology Components"
  63. Technical Readout: 3085, p. 50: "Produced Gürteltier Components on Hesperus II"
  64. Objective Raids, p. 56: "Produced Red Devil Industries Components"
  65. Technical Readout: 3026 Revised, p. 52: "Produced Condor Vehicle Components"
  66. Technical Readout: 3067 Revised, p. 74: "LGH-4W Lightray"
  67. Technical Readout: Jihad, p. 112: "LGH-4W Lightray"
  68. Starterbook: Wolf and Blake, p. 47: "Bryn Rivenschild - LGH-6W Lightray"
  69. MILSpec: "LGH-7W Lightray"