Attached gas-check
An attached gas-check was a copper plate that was physically attached to the base of a studded projectile of rifled muzzle-loading ("RML") artillery, sealing the escape of gas between the projectile and the barrel. == Gallery == RML 12.5in Studded Palliser Shell Mk III with Attached Gas-Check Mk II RML 12.5in Studded Common Shell Mk I with Attached Gas-Check Mk II RML 12.5in Studded Shrapnel Shell Mk I with Attached Gas-check Mk II == See also == Gas-checks in British RML heavy guns Automatic gas-check == References == Secretary of State for War (1887).