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

 * 1) RML 12.5in Studded Palliser Shell Mk III with Attached Gas-Check Mk II
 * 2) RML 12.5in Studded Common Shell Mk I with Attached Gas-Check Mk II
 * 3) RML 12.5in Studded Shrapnel Shell Mk I with Attached Gas-check Mk II