AK-630

AK-630
AK-630M-2 Duet with low RCS turret (the most recent variant of the system)
Type	Close-in weapon system
Place of origin	Soviet Union, Russia
Service history
In service	1976–present
Used by	See Operators
Production history
Designer	Developer: TsKIB SOO (Mikhail Knebelman; Vasily Bakalev (AK-630M1-2)) Cannon: KBP Instrument Design Bureau (Vasily Gryazev, Arkady Shipunov) Fire control system: Zavod Topaz (V. P. Yegorov): Vympel MR-123, Vympel-A MR-123/176 Ametist Design Bureau: Vympel-AM MR-123-02/MR-123-03, Vympel-AME MR-123-02/176
Designed	1963–1973 (AK-630) 1983–1989 (1993) (AK-630M1-2)
Manufacturer	Tulamashzavod
Produced	1972–present
No. built	More than 1000
Variants	AK-630M, AK-630M1; AK-306 (non-CIWS); AK-630M1-2, AK-630M-2 Duet
Specifications
Weight	Gun mount: 1,000 kg (2,200 lb) (AK-630) 1,800 kg (4,000 lb) (AK-630M) 2,500 kg (5,500 lb) (AK-630M-2) External nodes: 800 kg (1,800 lb) (AK-630) 2000 rounds in belt: 1,918 kg (4,228 lb) Fire control system: ? (Vympel MR-123) ? (Vympel-A MR-123/176) 5.2 tonnes (5.7 short tons) (Vympel-AM MR-123-02/MR-123-03 and Vympel-AME MR-123-02/176) 1 tonne (2,200 lb) (Laska 5P-10E)
Barrel length	1,629 mm (64 in) (total) 1,460 mm (57 in) (rifled)
Width	1,240 mm (49 in) (mount ring)
Height	1,070 mm (42 in) (above deck) 2,050 mm (81 in) (below deck)
Crew	1
Shell	HEI-Frag, Frag-T
Shell weight	0.39 kg (0.86 lb)
Caliber	30×165mm AO-18
Barrels	6 (× 2)
Action	Gas-operated rotary cannon
Elevation	+88° ... -12° (50°/sec) +90° ... -25° (60°/sec) AK-630M-2
Traverse	±180° (70°/sec) ±180° (80°/sec) AK-630M-2
Rate of fire	4,000–10,000 rounds/min
Muzzle velocity	880–900 m/s (2,900–3,000 ft/s)
Effective firing range	4,000 m (13,000 ft) (aerial) 5,000 m (16,000 ft) (maritime) 5,000 m (16,000 ft) (all) AK-630M-2
Maximum firing range	the projectiles self-destruct past 5,000 m (16,000 ft) range
Feed system	Belt, 2,000–4,000 rounds
Sights	Radar / TV-optical
Main armament	1 or 2 AO-18 autocannons
Secondary armament	4 9A4172 missiles (Vikhr-K upgrade)

The AK-630 is a Soviet and Russian fully automatic naval close-in weapon system based on a six-barreled 30 mm rotary cannon. In "630", "6" means 6 barrels and "30" means 30 mm. It is mounted in an enclosed automatic turret and directed by radar and television detection and tracking. The system's primary purpose is defense against anti-ship missiles and other precision guided weapons. However it can also be employed against fixed or rotary wing aircraft, ships and other small craft, coastal targets, and floating mines. Once operational, this weapon system was rapidly adopted, with up to 8 units installed in every new Soviet warship (from mine-hunters to aircraft carriers), and hundreds produced in total.

The complete weapon system is called A-213-Vympel-A, which comprises the AK-630M Gun Mount, MR-123-02 Fire Control Radar System, and SP-521 Electrical-Optical Tracker. A single MR-123 radar system can simultaneously control two guns, either two 30 mm gun mounts, or two 57 mm gun mounts, or one 30 mm gun and one 57 mm gun. The radar system can engage aerial and surface targets at 4 km and 5 km respectively. The electro-optical system can detect a MiG-21–sized aerial target 7 km away, while torpedo boat–sized surface targets can be detected at a range of up to 70 km. Features include surveillance and tracking modes, high jamming immunity, laser range finder and TV optical sight. It is in operation on almost all Russian Navy ships from fast attack boats to the Kirov battlecruiser.

The gun mount is fully automated, and can also be remotely controlled by an operator from either the control console or via a remotely mounted gunsight. It has a higher firing rate than both the Goalkeeper and Phalanx (Block 1 and older) CIWS models. They are often mounted in pairs, with as many as four pairs mounted on the larger ships, providing an effective point defence (last) layer. However, like all gun-based CIWS, they suffer from short engagement times and the need for multiple volleys to effectively eradicate a threat.

The AK-630 CIWS is composed of several members and sometimes the CADS-N-1 Kashtan's sub-systems and its derivatives are also included.