Russia / USSR
100 mm/70 (3.9") AK-100
Updated 19 November 2008

An "Arsenal" factory design, this weapon was originally designated ZIF-91 and was ready for trials in 1973.  This is a recoil-operated automatic weapon using a water-cooled barrel.  It uses an optronic analog control system called "Lev-114" and the gun sight is called "Kondensor-214A".

The entire weapon system is designated AK-100, while the gun itself is designated A-214.


100 mm/70 guns on Vitse-Admiral Kulakov (DDG-659), a Udaloy class guided missile destroyer in June 1988
Missile launchers under the bridge are for SS-N 14 anti-ship missiles
U.S. Navy Photograph No. DN-ST-88-09282


100 mm/70 guns on Admiral Vinogradov (BPK-554) in October 1992
U.S. Navy Photograph No. DN-SC-93-04774


100 mm/70 gun on Udaloy class Destroyer

Gun Characteristics
Designation 100 mm/70 (3.9") A-214
Ship Class Used On Kirov (Admiral Ushakov), Udaloy, Bditelny and Neusrashimy Classes
Date Of Design 1967
Date In Service 1978
Gun Weight N/A
Gun Length oa 275.6 in (7.000 m)
Bore Length N/A
Rifling Length 232.28 (5.900 m)
Grooves N/A
Lands N/A
Twist N/A
Chamber Volume N/A
Rate Of Fire 50 - 60 rounds per minute
Type Fixed
Weight of Complete Round 59.1 lbs. (26.8 kg) for all rounds
Projectile Types and Weights FRAG (OF-58) - 34.4 lbs. (15.6 kg)
AA (ZS-58 and ZS-58P) - 34.4 lbs. (15.6 kg)
Bursting Charge All - 3.37 lbs. (1.53 kg)
Projectile Length FRAG (OF-58) - 40.39 in (1.026 m)
AA (ZS-58) - 40.79 in (1.036 m)
AA (ZS-58P) - 40.67 in (1.033 m)
Propellant Charge N/A
Muzzle Velocity All - 2,887 fps (880 mps)
Working Pressure N/A
Approximate Barrel Life N/A
Ammunition stowage per gun Neusrashimy:  350 rounds
Others:  N/A
Note:  ZS-58 round uses a mechanical time fuze while the ZS-58P uses a radio proximity fuze.
Elevation With 34 lbs. (15.6 kg) FRAG (OF-58) Shell
Max Ballistic Range 22,970 yards (21,000 m)
Elevation With 34 lbs. (15.6 kg) AA (ZS-58P) Shell
Max Range Against ASuW Missiles 5,470 yards (5,000 m)
Max Range Against Aircraft 10,940 yards (10,000 m)
Mount / Turret Data
Designation Single Automatic Turreted Mount AK-100
Weight 34.94 tons (35.5 mt)
Elevation -10 / +85 degrees
Rate of Elevation 30 degrees per second
Train 360 degrees
Rate of Train 35 degrees per second
Gun Recoil 20 in (51 cm)
Data from
"Jane's Ammunition Handbook:  Ninth Edition 2000-2001" edited by Terry J. Gander and Charles Q. Cutshaw
"Entsiklopedia Otechestvennoi Artillerii" (Encyclopedia of Fatherland (Russian) Artillery) by A.V. Shirokorad
"Slava, Udaloy and Sovremenniy" by Steven J. Zaloga
Special help from Vladimir Yakubov