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The YMS-11 Act Zaku (Kycilia's Forces) is a mobile suit from Mobile Suit Discovery.

Design & Development

The MS-11 Act Zaku is a high-performance, close combat MS designed to succeed the MS-06 Zaku II and developed as part of the "Pezun Plan" near the end of the One Year War [1][2]. Headquartered in Side 3 and with an arsenal built in the small asteroid Pezun, the "Pezun Plan" is a top-secret weapons development plan drew up by the upper-level of Zeon's military to create next generation mobile suits to help break the war's deadlock[2][3].

The Act Zaku used by Kycilia's Forces has a unique head crest, and was equipped with joint drive system that used the same field motor as Earth Federation Forces mobile suits.[2]. Sections of the suit used Zaku II's equipment, such as the backpack which was caused by delays in the development of new thrusters and fusion reactor[2][3]. It also used some of the Zaku II's weaponry and was likely a test type[2]. Later given the model number "YMS-11", its original model number remains unknown[2][3].


  • Quadruple-Barrel Machine Gun
A new four-barrel machine gun under development for the Act Zaku under the Pezun Plan [2].
  • Shoulder Shield
A shield mounted on the right shoulder.
  • Large Heat Hawk
Specially made for the Act Zaku, it has an enlarged generator for heating the blade to ultra-high temperature[2]. The suit can be armed with a pair of large heat hawks, one stored on each side skirt armor[2].
  • Heat Hawk
The same weapon as used by the Zaku II, it has an extendable handle. Can be stored on the side skirt armor[2].

Operational History





  1. Official MSD(Mobile Suit Discovery)Website Plamodel Page
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 1/144 HG Origin YMS-11 Act Zaku [Kycilia's Forces] model kit instruction manual
  3. 3.0 3.1 3.2 Official MSD(Mobile Suit Discovery)Website Mechanical Page

External Links

Mobile Suit Gundam: The Origin Mechanics

Anaheim Electronics
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Autonomous Republic of Zeon
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MS-01 Mobile Worker | MS-04 Bugu | MS-05 Zaku I/Origin | Mobile Worker MW-01 Model 01 Early Type | Mobile Worker MW-01 Model 01 Final Type | Mobile Worker MW-01 Model 01 Late Type | YMS-03 Waff

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MS-06C Zaku II | MS-06C-6/R6 Zaku II | MS-06S Char's Zaku II | MS-06S Zaku II Commander Type/Origin

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Musai-class Early Production Type
Y-02 Development and Training Team
Mobile Weapons, Workers & Armors
MS-04 Bugu | MS-11 Act Zaku/Origin | YMS-08B Dom Test Type
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