Russia / USSR
30 mm/54 (1.2") AO-18 Gun
used in the following Mountings
30 mm/54 (1.2") AK-630
30 mm/54 (1.2") AK-306
30 mm/54 (1.2") 3M87 Kortik
30 mm/54 (1.2") Palash

Updated 19 November 2008

Design of the AK-630 (A-213) gun system started in 1963.  The first prototype was made in 1964 and trials were conducted until 1966.  The trials of the complete system with radar and controls went on until 1976 when the system was accepted for service.  Production started in 1969 in Tula, with a modified AK-630M (A-213M) system accepted into service in 1979.  These systems are the main close-in defense systems on modern Russian ships.

The gun itself is a 6 barrel Gatling gun designated as AO-18.  The barrels are in a single block, having exhaust-driven joint automatics.  They are belt fed with a flat magazine in the AK-630 and a drum magazine in the AK-630M.  These weapons form a part of a complete self-defense system called A-213-Vympel-A, which includes gun, radar, optical and TV control systems.  A single MP-123 Vympel system can control two 30 mm guns or one 30 mm and one 57 mm gun.  This system can engage air targets at ranges up to 4,000 m (4,400 yards) and surface targets at ranges up to 5,000 m (5,500 yards).  The TV control system can detect MTB sized ships at the distance of 75 km (40 nm) and the fighter-size air targets at 7,000 m (7,600 yards).  This system is completely automatic and does not require human supervision although it can be directed from optical control posts in case of damage or for firing on shore targets.

The AK-306 (A-219) system was a modification of the AK-630 (A-213) system for use on light ships, like air cushion craft, ekranoplanes and small displacement motor boats.  Externally, there was no difference between AK-306 and AK-630 guns, but internally instead of using the exhaust to power the automatics, the AK-306 (A-219) used electricity.  This version also lacked radar control, being only optically guided, hence making it less of a anti-missile weapon and more of a surface-to-surface weapon.  The design started in 1974 and the system was accepted into service in 1980.  By 1986, 125 systems were in service.

In 1983 a decision to modify the AK-630 systems was made and the design of the AK-630M1-2 "Roy" system started.  This weapon uses two AO-18 six barrel blocks, placed one above the other, and its size and weight allowed it to be placed in existing AK-630 positions.  The system was tested from 1984 to 1989, but, due to the appearance of the gun-missile systems, it was not put into production.  The single example remains installed on the P-44 (Pr. 206.6) missile boat.

In the end of the 1970s the design of the gun-missile system 3M87 "Kortik" was started.  This model uses two AO-18 six-barrel blocks and eight  9M311 missile launchers.  Unlike the AK-630, the ammunition is not stored under the mount, but in drums next to the barrels.  The Kortik control system can control from one to six mounts and has both radar and optical-TV controls.  The missiles are supposed to engage targets from 1,500 to 8,000 m (1,600 to 8,750 yards) with the guns taking over at shorter ranges.  The missiles weighs 43.6 kg (96 lbs.) each and have a lethal radius of 5 m (16 feet).  The trials of the mount started in 1983 and the weapon was accepted into production in 1989 and was installed until 1994.  At first, it was intended to replace all of the AK-630 mounts with 3M87 mounts, but the 3M87 was significantly larger and taller than the AK-630 which limited its use to ships that could handle the extra mass.

In the 1990s a new system was started using two AO-18KD six-barrel blocks and eight missiles.  It was at different times called Palash or Palma and is currently offered for export sales.  This system can use any type of small heat-seeking missiles such as Strela-10, Igla, Stinger and Mistral.  It can also use the hyper-velocity laser guided Sosna R missiles.  However, with the current state of the Russian economy, it is unknown if the system will ever go into production.

At this moment there are many modernization projects for AK-630, 630M and 306 systems pending, mostly by adding missiles to the sides of the systems.  These are aimed for export sales.


30 mm/65 (1.2") AK-630 aboard USNS Hiddensee
U.S. Navy Photograph No. DN-SC-93-05853


AK-630M1-2 Roy on the small missile ship P-44


30 mm Kortic mounting on Neustrashimy

Gun Characteristics
Designation 30 mm/54 (1.2") AO-18
Ship Class Used On AK-630
   Most of the modern and modernized ships from Kirov class BCs to missile boats

   Kasatka (Pr. 1238) air cushion craft, Vozh (Pr. 1248) and Riyavka (Pr. 1249) river gunboats
   Baskintsak (Pr. 1595) tankers, Lida (Pr. 1075.0) Inshore minesweeper and others

AK-630M1-2 "Roy"
   P-44 (Pr. 206.6) missile boat

3M87 "Kortik"
   CV Admiral Kuznetsov (Pr. 1143.5), BC Admiral Nakhimov (Pr. 1144), Neustrachimy (Pr. 1154) class frigates

Date Of Design 1963
Date In Service AK-630:  1976
AK-630M:  1979
AK-306:  1980
3M87:  1989
Gun Weight AO-18 (for AK-630):  under 452 lbs. (under 205 kg)
AO-18L (for AK-306):  341.7 lbs (155 kg)
GSh-6-30K (for AK-630M1-2):  352.5 lbs. (160 kg)
Gun Length oa 64.13 in (1.629 m)
Bore Length 63.78 in (1.620 m)
Rifling Length 57.48 in (1.46 m)
Grooves 16
Lands N/A
Twist N/A
Chamber Volume N/A
Rate Of Fire AK-630:  4,000 - 5,000 rounds per minute
AK-630M:  4,000 - 5,000 rounds per minute
AK-630M1-2:  10,000 rounds per minute
AK-306:  600 - 1,000 rounds per minute
3M87:  10,000 rounds per minute
Palash:  1,000 rounds per minute
Type Fixed
Weight of Complete Round 1.834 - 1.839 lbs. (0.832 - 0.834 kg)
Projectile Types and Weights HE-FRAG (OF-84) - 0.86 lbs. (0.39 kg)
FRAG tracer (OP-84) - 0.86 lbs. (0.39 kg)
Bursting Charge HE-FRAG (OF-84) - 0.107 lbs. (0.0485 kg)
FRAG tracer (OP-84) - 0.026 lbs. (0.0117 kg)
Projectile Length up to 11.54 in (293 mm)
Propellant Charge N/A
Muzzle Velocity All:  2,953 fps (900 mps)
3M87:  2,822 fps (860 mps)
Palash:  3,609 fps (1,100 mps)
Working Pressure N/A
Approximate Barrel Life AK-630:  8,000 rounds (automation resource)
AK-306:  18,000 rounds
Ammunition stowage per gun AK-630:  2,000 rounds
AK-630M:  2,000 rounds
AK-630M1-2:  4,000 rounds
AK-306:  500 rounds
Elevation With 1.2 lbs. (0.54 kg) HE/Frag Shell
Max Ballistic Range 8,860 yards (8,100 m)
Self Liquidation range 5,470 yards (5,000 m)
Effective Targeted Range  4,375 yards (4,000 m)
Mount / Turret Data
Designation Single Mounts

Twin Mounts

Twin Gun-Missile Mounts

Weight  AK-630 (empty):  4,079 lbs. (1,850 kg)
AK-630 (with ammo):  4,226 lbs (1,918 kg)
AK-630 (with control systems):  20,093 lbs. (9,114 kg)
AK-630M1-2 (empty):  5,512 lbs. (2,500 kg)
AK-630M1-2 (with ammo and control systems):  26,056 (11,819 kg)
AK-306 (empty): 2,425 lbs. (1,100 kg)
AK-306 (with ammo and control systems):  3,594 lbs. (1,630 kg)
3M87 (with ammo and control systems):  34,172 lbs. (15,500 kg)
Palash (with ammo and control systems):  15,212 lbs. (6.900 kg)
Elevation AK-630:  -12 / +88 degrees
AK-306:  -12 / +85 degrees
AK-630M1-2:  -25 / +90 degrees
Elevation Rate 50 degrees per second
Train -180 / +180 degrees
Train Rate 70 degrees per second
Gun recoil AK-630:  0.51 in (13 mm)
Data from
"The Naval Institute Guide to World Naval Weapon Systems 1991/92" by Norman Friedman
"Etsiklopediya Otechestvennoi Artillerii" (Encyclopedia of Fatherland (Russian) Artillery) by A.V. Shirokorad
Special help from Vladimir Yakubov