COCK n.
firearm. At cock, At full cock, with the hammer raised and ready to fire; -- said of firearms, also, jocularly, of one prepared for instant action. -- At half cock. See under Half. -- Cock feather (Archery), the feather of an arrow at right angles to the direction of the cock or notch. Nares.
COMPRESSION PROJECTILE n.
rmly attached near its base or, formerly, by means of an envelope of soft metal. In small arms the modern projectile, having a soft core and harder jacket, is subjected to compression throughout the entire cylindrical part.