English: An FFV 890C, from the collections of the Swedish Army Museum.

The FFV 890 was initially based on the ARM variant of the IMI Galil, and the earliest rifles were indeed just plain Galil ARMs manufactured by Israel Military Industries (nowadays Israel Weapon Industries) in Israel. Over the course of the development FFV decided to move to the Galil SAR as a base design, and after some IMI manufactured FFV 890 rifles FFV started licence manufacturing in the Eskilstuna Carl Gustafs Stads Gevärsfaktori for the FFV 890C. It is unclear whether complete rifles ever had all of their parts manufactured by FFV. Both IMI and the Finnish state firearms company Valmet (Valmet firearms division was later merged to Sako) participated in the production of parts and assisting FFV in the production of the 890. The chief firearms designer of Valmet, Timo Hyytinen, described working with FFV as easy and unproblematic, but that the Swedish Armed Forces had resentment towards cooperation with Valmet.

FFV entered the FFV 890 into the Swedish Armed Forces trials for the new 5.56 mm assault rifle. The initial trials took place in 1974–1976, with the FFV 890 (both the ARM and SAR) competing against the Heckler & Koch HK33, FN FNC, FN CAL, Colt M16A1, Steyr AUG, Beretta AR70, ArmaLite AR-18, SIG SG 540 and Stoner 63. The FFV 890 and FN FNC turned out superior over the other competitors, especially in regard to reliability in winter conditions, which led to the disqualification of the other competitors (although FN CAL was disqualified due to production being shut down).

Between 1975 and 1979 FFV dropped the ARM variant and continued development with only the SAR variant. This development finally led to the FFV 890C, which was different to the Galil SAR in some aspects: it had a shorter gas system (shorter gas tube and piston), two-piece clamshell front handguard similar to FN FNC and Valmet RK 62 76, redesigned and larger magazine release lever, larger right side selector, larger trigger guard, shorter barrel (348 mm), case deflector attached to the receiver cover, OD green paint, rubber recoil buffer and Swedish-based markings for the selector positions.

After some trials, the Swedish Armed Forces requested some changes to the FFV 890C. FFV incorporated the following changes: horizontally oriented charging handle (similar to the AK) instead of the vertically oriented charging handle of the Galil, return to the standard Galil trigger guard and magazine release lever, additional notch to the right side selector lever, additional cross bar safety similar to the FN MAG, and the rear sight was changed to similar to the rear sight in the FN Minimi. The stock was also painted green.

After the 1979-1980 trials in the 11th Infantry Regiment at Växjö, the military and soldiers having participated in the trials described the FFV 890C as superior to the FN FNC but the FN FNC was described as better in the official documents; officially neither rifle passed the trials. The FNC was cheaper and employed more modern manufacturing methods over the 890C, namely stamping instead of milling. FFV attempted to convert the manufacturing process of the 890C to stamped receivers similar to the AKM, but was unsuccessful in doing so. There were political difficulties between Israel and Sweden at the time, with the Swedish government not having high regard for Israel, which may also have played part in the decision. The adoption of an initially Soviet design would possibly also have been problematic to the neutral non-alignment policy of Sweden at the time. The Swedish Armed Forces were also unwilling towards any deeper cooperation with the Finnish state company Valmet, which was assisting FFV in the production of the parts of the 890C, and they sought a solution which wouldn't have included cooperation with Valmet. The FMV (Swedish Defence Materiel Administration) officially declared the FN FNC as the winner after the trials had ended.

Over the course of the development of the FFV 890C, less than 1000 rifles were manufactured.

FFV later sold all of the blueprints and development work to Valmet, which presumably incorporated some features into its rifle development.