The GAT-01A1 Dagger is the other mass-production mobile suit, besides the GAT-01 Strike Dagger, to be developed by the Earth Alliance during the First Alliance-PLANT War using data from the GAT-X105 Strike Gundam. In fact, it is the "true" mass production MS that the Alliance had in mind, the Strike Dagger is a stripped-down version of it for quick production. The suit is commonly known as "105 Dagger" as it can utilize the Striker Packs used by the Strike, and to differentiate it from the Strike Dagger. It also has the ability to be fitted with the same high-performance sensor suit used in the Strike's head and unlike the Strike Dagger, it is equipped with proper EMP shielding from the start, and fitted with two head-mounted antennae as well as CIWS, although the latter has been altered to use 40mm ammunition. Other armaments include a pair of foot-mounted 12.5mm anti-infantry guns, a pair of beam sabers mounted on the side armor, a shield for defense, and either a hand-held machine gun or beam rifle for ranged combat.