General Characteristics
Primary Function: Anti-ship missile defense.
Contractor: Raytheon Systems Company (formerly Hughes Missile Systems Company and purchased from General Dynamics Pomona Division in 1992)
Date Deployed: 1980 (aboard USS Coral Sea)
Block 1: 1988 (aboard USS Wisconsin)
Block 1B: 1999 (aboard USS Underwood)
Weight: 12,500 pounds (5,625 kg) - Later models: 13,600 pounds (6,120 kg).
Range: Classified.
Type Fire: 3,000 rounds per minute - Later models: 4,500 rounds/min (starting 1988 production, Pneumatic Gun Drive).
Magazine Capacity: 989 rounds - Later models: 1,550 rounds.
Caliber: 20mm.
Ammunition: Armor Piercing Discarding Sabot, depleted uranium sub-caliber penetrator. Penetrator changed to tungsten 1988. Block 1B will incorporate the new Enhanced Lethality Cartridge with heavier penetrator.
Type: M-61A1 Gatling Gun.
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