The boats featured a mixture of Western and Eastern European equipment, including Soviet anti-ship missiles and Swedish guns.

Mounted on four shafts, two MTU 16V 538 TB91 diesel engines are used for economical cruising while two RR Marine Proteus 52 M gas turbines are used for achieving high speeds.

During the development phase, the designers planned on using French Exocet anti-ship missiles as the class's main weapon system.

However, due to the high price the French asked for the missile, possibly because of political reasons, the project was changed and two Soviet P-20 (SS-N-2B) were used instead.

[6][1] During the late 1980s and early 1990s Rade Končar and Vlado Ćetković underwent a modernization program which included removing the stern 57 mm Bofors and installing a Soviet AK-630 CIWS.

Croatian coastal batteries in the area operated two captured Bofors 40 mm (1.6 in) guns with only one of them being in position to open fire on the ships.

After a quick repair, the missile boat was targeted again, with three rounds hitting the stern section and causing no damage because the gun crew didn't have armor-piercing ammunition at their disposal.

The boats took self-preservation measures such as camouflage, changing berths often and hiding in the submarine pens in the Bay of Kotor, to make it more difficult for the NATO aviation to target them (which, ultimately, it never did).

[19] In June 2006, Hasan Zahirović-Laca sailed from Boka Kotorska to Italy to participate in the international naval exercise "Adrion Livex 06".

The Kenyan Navy plans on stripping the boat of its guns and fire-control systems which would then be overhauled and installed on the offshore patrol vessel KNS Jasiri.

[13] In February 2014 it was revealed that the Montenegrin Ministry of Defense chose the Brodarski institut from Zagreb to create the project documentation for the modification of the missile boats.