This paper model is a SD RMS-154 Barzam, a mass-produced general purpose mobile suit featured in Mobile Suit Zeta Gundam and the photo-novel Advance of Zeta: The Flag of Titans, the papercraft is created by Orekue.
The RMS-154 Barzam was designed to be a high-performance unit for use by regular forces, but in low cost. The Barzam was submitted as a proposal for a mass production type model based on the RX-178 Gundam Mk-II, and was developed for the EFF as their next flagship MS. However, it was not able to secure enough development time for this request, and planning was carried out based on the design of existing MS.
Construction was completed at the EFF New Guinea base, most notably with the involvement of former Zeon engineers. The completed unit is said to be a high performance machine, having balanced specifications because it adopted the design concept of the Gundam Mk-II. However, because priority was given to ease of production and the result of excessive simplification of the machine's structure, its form is very different over that of existing MS. The chest armor has a double structure, designed with consideration for the safety of the pilot. It features a Zeon-style mono-eye camera/sensor in the head. In addition, the waist and abdomen have been integrated into the chest, with legs fixed directly from the bottom edge of the chest. The Barzam was highly versatile, and could be equipped with any of the hand-held weaponry available to the RMS-179 GM II, and RMS-106 Hizack mobile suits, as well as its own unique beam rifle. It also featured two beam sabers stored in the recharge racks in its forearms, and could be equipped with the head-mounted double-vulcan pods created for the Gundam Mk-II, and also the generator from the RMS-108 Marasai. [Source: wikia]