Based on the "X105 Strike" developed by the Atlantic Alliance, the "Striker Pack System (SPS)" installed in that mobile suit achieved significant results, and its practicality was highly praised among the military's upper echelons. Later, the mobile suit "Dagger" was developed with the mass production of SPS-compatible mobile suits in mind.

Although the specifications of the "Dagger" deployed in combat met the demands of the upper echelons, some technical officers were not satisfied with the mobile suit's performance and repeatedly requested the upper echelons responsible for the "Dagger" to redevelop the "X105 Strike," finally receiving approval after several attempts. However, this

GAT-03X2 Prototype Windam/Strike Next Generation Mass Production Test Unit | ユースケ's Gunpla works