The GMM is guided by semi-active laser (SAL) homing which can be directed by a laser designator either mounted on the launcher or used by an assistant, capable of firing in lock on before launch (LOBL) and lock-on after launch (LOAL) modes to track and engage moving targets out to 2,500 m; other seeker options including imaging infrared (IIR) are also under consideration.
[1][2][3][4][5][6] After the unveiling of the lightweight M4 Carl Gustaf in October 2014, Saab began developing a concept dubbed the Ultra Light Missile, a guided round that could be fired from the recoilless rifle out to extended ranges.
In November 2017, Saab and Raytheon teamed up to further cooperate on the project, and in September 2018 they were awarded a contract to answer a U.S. Special Operations Command (SOCOM) requirement for a precision guided Gustaf round.
It was unveiled publicly as the Guided Carl Gustaf Munition (GCGM) in October 2018.
As it had been adapted to be launched from the AT4, the name was changed to the Guided Multipurpose Munition since it was no longer strictly related to the Carl Gustaf.