The ACKS V.F.G. Macross Delta VF-31J Siegfried Ver.1.3 Plastic Model is an intricately designed model kit that celebrates the 35th Anniversary of the Macross series. This model features a transformable design, allowing for three distinct modes through the use of alternate parts, enhancing its display versatility. The model is constructed with snap-fit plastic components and comes in color-coded molds, reducing the need for painting. It includes various expression parts, with tampo printed options and one blank face, providing customizable display options. Stickers and eye decals are included to add detailed finishing touches. Notably, this version has refined parts and improved articulation, with enhancements such as a new open hand part for the machine body and remade elbow joints for the accompanying girl figure.

Macross Delta is a popular anime series set in a universe where music and combat intertwine. The VF-31J Siegfried is a variable fighter piloted by skilled members of the Delta Flight, part of the tactical sound unit Walküre. These fighters are designed to combat the Var Syndrome, a mysterious phenomenon that threatens humanity. The VF-31J Siegfried stands out for its versatility in battle, capable of transforming between Fighter, Gerwalk, and Battroid modes. Its design reflects the series' theme of harmony between technology and human emotion, with its sleek lines and advanced weaponry. The series explores the power of music as a force of unity and resistance, with the VF-31J serving as a symbol of hope and innovation in the ongoing struggle.