GIAT CN120-25 G1 (120 mm)

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The GIAT CN120-25 G1 is a 120 mm smoothbore gun and it could fire variety of NATO 120 mm ammunition, including the French OCC 120 G1 HEAT but also the OFL 120 G1 APFSDS, which are all suitable for every NATO 120 mm smooth bore gun. The OFL 120 G1 is capable of penetrating up to 420 mm of RHA steel armour at a range of 1,000 m.

Vehicles equipped with this weapon

General info

The CN120-25 G1 is a cannon that was used in the AMX-32 and the AMX-40 prototype tanks. It is very similar to the GIAT CN120-26 F1 in terms of looks and performance.

Available ammunition

Penetration statistics
Ammunition Type of
Penetration @ 0° Angle of Attack (mm)
10 m 100 m 500 m 1,000 m 1,500 m 2,000 m
OCC 120 G1 HEATFS 480 480 480 480 480 480
OFL 120 G1 APFSDS 394 393 388 382 376 370
Shell details
Ammunition Type of
Mass (kg)
Fuse delay
Fuse sensitivity
Explosive Mass
(TNT equivalent) (g)
0% 50% 100%
OCC 120 G1 HEATFS 1,050 14.3 0 0.1 2,148 65° 72° 77°
OFL 120 G1 APFSDS 1,650 3.8 N/A N/A N/A 78° 80° 81°

Comparison with analogues

Comparable cannons to the GIAT CN120-26 F1
Name Year of Production RPM Maximum Penetration (mm)
GIAT CN120-26 F1 1980s 10 575
Ordnance BL Tk. L11 1957 6 410

Usage in battles

Hit and Run

The CN120-25 G1 cannon is best suited for "Hit and Run" attacks, as the tanks it is mounted on have adequate mobility to make these attacks possible and effective. The user should try to flank the enemy as the rounds the CN120-25 G1 fires, will have a hard time penetrating the frontal plates of enemy USSR tanks. Side shots and rear shots are the best way to engage and enemy with this cannon as most of the time, going head-on and engaging the frontal armour of enemy tanks will be a suicide mission.


The CN120-25 G1 can also be used to snipe enemies from afar. It isn't the best idea to do so, and the more effective way to snipe would be to combine a flanking playstyle with the sniping playstyle. As mentioned above, the rounds that the CN120-25 G1 fires aren't effective against frontal armour of enemy tanks, like for example the T-72BT-72B3T-80B and T-80U tanks, so the user should focus on side or rear shots. Finding a position behind enemy lines or on the sides with adequate cover, will make the CN120-25 G1 shine.

Pros and cons


  • Gun is stabilized; one of the few modern tanks that have a stabilizer in the French tree
  • High velocity for its APFSDS shell


  • Not enough penetration power to pierce trough most frontal armour plates; side shots are essential
  • Creates bellow-average amounts of spalling; multiple shots will be required


As the AMX-32 had failed to attract any potential sales, GIAT decided to produce yet another upgrade, the AMX-40 Main Battle Tank. The development of the AMX-40 began in 1980 as a clean sheet design. In 1983, the first prototype was finished and presented at the Satory Exhibition that year. Two further prototypes were produced in 1984; the fourth and last one was fabricated in 1985. It ceased being offered for export in 1990 and with it, the CN120-25 G1 as well as it was only mounted on the AMX-32 and the AMX-40 prototypes.



See also

External links

France tank cannons
20 mm  20F2
25 mm  SA34 L/72
37 mm  SA18 L/21 · SA38 L/33
47 mm  SA34 L/30 · SA35 L/32 · SA37
75 mm  APX · SA35 L/17 · SA44 · SA49 · SA50 L/57
90 mm  CN90 F3 · CN90 F4 · DEFA F1 · SA45
100 mm  SA47 L/58
105 mm  CN-105-F1 · Modele F2 · PzK M57
120 mm  GIAT CN120-25 G1 · GIAT CN120-26 F1 · SA46
142 mm  ACRA
155 mm  L'Obusier de 155 Modèle 1950
15 mm  MG 151 (Germany)
20 mm  MG 151 (Germany)
37 mm  M6 (USA)
40 mm  QF 2-pounder (Britain)
75 mm  KwK42 (Germany) · M3 (USA) · M6 (USA)
76 mm  M7 (USA)
105 mm  M4 (USA)