Hughes EP-13 Particle Beam Gun Pod

The Hughes EP-13 was a three-barreled 80mm particle gun pod based on the earlier EP-12. Due to its scaled-down size, it had a slower rate of fire at 170 rounds per minute in full automatic mode versus the EP-12’s 240 rounds per minutes. Like the EP-12, it could fire all three barrels simultaneously in semiautomatic mode at approximately one shot per second. This weapon fired one 8.2 MJ pulse per barrel in each mode, with its own dedicated protoculture cell and capacitor banks in the ‘magazine’. This specific Protoculture cell was a rare example of a non-standard unit in service with the UEEF, as almost all of their mecha used the “Standard Tiresian Protoculture Cell”. This weapon, built into an external shell identical to that of the GU-13, was developed in 2025 by the UEEF, but didn’t see wide use until 2026. By 2031, the EP-13 had almost completely replaced the GU-13 as the main cannon of Alphas in the UEEF’s inventory. The weapon is stored under the wing root in fighter mode, and in the hand in GERWALK and Battloid modes.

  • Designed: 2025
  • Manufacturer: Hughes Electronics (Robotech Factory Satellite production facility)
  • Weight: 862 kg.
  • Length: 489 centimeters
  • Height: 287 centimeters
  • Width: 46 centimeters
  • Rate of Fire: 170 discharges per minute
  • Output: 8.2 MJ
  • Ammunition Capacity: Approximately 1800 discharges before Protoculture cell depletion
  • Platforms: Alpha, Boxer, Excalibur, Gladiator, Jackal, Thakun, Spartan II


Robotech (R) is the property of Harmony Gold. Genesis Climber MOSPEADA (R) is the property of Fuji Television, Artmic Studio and Tatsunoko Production.  This document is in no way intended to infringe upon their rights.

Acknowledgement is extended to Peter Walker, Pieter Thomassen and Robert Morgenstern of the unofficial Robotech Reference Guide. Peter Walker, Pieter Thomassen and Robert Morgenstern are given credit for all quotes and paraphrasing of the unofficial Robotech Reference Guide that has been utilized on Robotech Illustrated. 

Sources: Robotech the Expeditionary Force Marines Source Book by Irvin Jackson

Content by Tim Wing, with Pieter Thomassen, with Peter Walker and Rob Morgenstern

Copyright © 2001 Robert Morgenstern, Pieter Thomassen, Peter Walker2021 Tim Wing