A news report about the USS Iowa gun turret explosion in 1989.
British Army Combat Shotgun
The Combat Shotgun is a semi-automatic, tubular magazine fed weapon cambered for the 12 gauge shot/shell cartridge. The operating system employed is the improved ARGO (Auto-Regulating Gas Operated) Twin (two gas pistons/cylinders/ports) System with a rotating bolt head with dual locking lugs. It is fitted with an EOT tech sight, for use by day or night, a fixed iron sight and has a telescopic 3- position extendable buttstock. The shotgun can be fitted with a single point elasticated sling or the issued rifle sling and can be fired from any of the conventional fire positions with the exception of the squatting position.