Dissatisfied with the range of both the US 155 mm and the Soviet 152 mm gun, and considering the lack of desired features, a number of specifications were defined with characteristics that a new domestic gun-howitzer should have: Three versions of NORA were designed: Work on the NORA project began in 1975, and in May 1980, the first prototype of NORA-A was sent to the Technical Testing Center.

The M-84B2 version is fitted with a pneumatic loader which is operational at all gun elevations, with a capacity of over 30 work cycles from one standard compressed air tank mounted on one of the trails.

Today, the latest version, NORA B-52, has little similarities with the original NORA-B project, as the new system is much more modern and automated.

On the basis of the NORA M-84 development, a conversion of Soviet 130 mm towed field gun M1954 (M-46) to a bigger caliber was set.

[1] It has a maximum muzzle velocity of 895 meters per second, and was ahead of Soviet ammunition for 152 mm howitzer 2A65 at the time of introduction.

Variant fitted with a pneumatic loader which is operational at all gun elevations, with the capacity to fire over 30 round.

Lightweight variant with 155 mm 39-caliber barrel and high rate of fire (8 rpm), new counter-recoil system and the possibility of use of semi-automatic loader.