the Swedish Army. Kulspruta 58 B: In the early 1970s, the weapon was modified with a new gas regulator and at the same time the barrels were replaced to the new standard 7.62×51mm NATO, same as used by the Ak 4. Ksp 58 replaced the considerably heavier Ksp m/42B in the infantry units. It can be fed with non-disintegrating DM1 or disintegrating M13 linked ammunition belts. Kulspruta 58 C: On Combat Vehicle 90, this version replaced the previously used Ksp m/39 in the third quarter of 2004. Kulspruta 58 Strv: stripped variant mainly used for fixed mounting in tanks. Phased out along with Stridsvagn 103. Kulspruta 58 D: Reserved designation for the renovated and modified Ksp 58B. The trial version is referred to as 'Ksp 58 DF', where the 'F' stands for 'Försök' (Experimental). Some of the modifications: A MIL-STD 1913 Picatinny rail system added. Half of the weapons feature an adjustable rail - the others a fixed. Red dot sight (Aimpoint CompCS). The carrying handle is shortened to half its original length. This was necessary in order to fit an extended rail for sight systems. Cbuttstock butt stock or folding stock. 100 mm shorter barrel. Better and shorter flash hider to reduce the length of the weapon and to produce a smaller muzzle flash, which means less disruption to the user's night vision. Fluted barrel in order to reduce the weight and better dissipate the heat of the barrel. Gas regulator has only 4 settings (instead of 8). The last position is painted red and is intended for emergency use. Larger 100-round ammunition pouches replaced 50-round pouches. New ammunition cases. New equipment bags. Bi-pod is painted green. There is a sheet for protection / one side green other side white / summer & winter camouflage. The weight of the MG is the same, but the entire system is 3 kg (6.5 lbs) lighter. US Army versions On January 14, 1977, the US Army awarded a contract to FN Herstal for the delivery of a modernized Model 60-40 variant tank machine gun designated the M240. Initially, the firearms were produced in Belgium. Currently they are manufactured in the US by FN's US wholly owned subsidiary FNMI (FN Manufacturing Inc.) located in Columbia, South Carolina, and by U.S. Ordnance in McCarran, Nevada. The M240 is built in several versions: M240 standard coaxial machine gun used in US armored vehicles. It is