Zastava's website claims that the M91 rifle was designed after a long and careful study of combat tactics and experience of military and police special forces worldwide; and that its development has been carried out under supervision and in close cooperation with some of the most experienced and capable special and anti-terrorist units.
Proizvođač Zastava Arms na svojim web stranicama tvrdi da je M91 razvijen nakon dugog i pažljivog istraživanja borbene taktike i iskustava vojnih i policijskih specijalnih snaga u svijetu te da je njegov razvoj bio pod nadzorom i bliskom suradnjom nekih od najiskusnijih i najboljih specijalnih i antiterorističkih jedinica.