_Freeing._—Slightly enlarging the bore of a gun at the muzzle. _Frizzen._—In the old flint-lock the steel plate that covers the pan and stood up in front of the flint, against which the flint struck to produce fire to ignite the priming. _Grip._—A name usually applied to the round part of a gun stock just back of the locks. It is also applied to the handle of a pistol. _Guard._—The piece of metal which curves around the triggers and protects them. _Half Stock._—A gun stock that does not extend the full length of the barrel. _Hammer._—That part of the gun-lock that strikes the plunger or cap, or other form of ignition. See cock. _Hammer-Gun._—A gun whose lock works with a hammer. _Hammerless Gun._—A gun whose arrangements for setting off the ignition are contained inside the breech mechanism, and not visible when the arm is ready for use. _Handle._—See grip. _Hazel Nut._—A small shrub growing abundantly in many portions of the United States. The _Corylus_ of botanists, divided into two species, _Americana_ and _Rostrata_. _Head._—In a gun stock, the part where the breech end of the barrel rests against. _Heel Plate._—The metal piece terminating the breech end of a gun stock. _Hind Sight._—The sight upon the barrel, nearest the breech. _Hinge Pin._—A pin fixed in the action on which the barrel plays. _Ignition._—Any chemical combination which can be caused to explode and fire the charge, as in a cap or cartridge, for instance. _Kentucky Rifle._—A form of rifle, once very popular with Western hunters, and now used to some extent. It is muzzle loading, and the great length of the barrel was one great peculiarity. _Kick._—When a gun rebounds at firing the term is used “it kicks.” _Land Space._—The space in the bore of a rifle between the grooves. _Lever._—The bar or rod the working of which locks or unlocks the action of a breech-loader, enabling the operator to open or close the gun. As top-lever, side-lever, under-lever, etc. _Lock Plate._—The flat plate to the inside of which all the other parts of the gun-lock are secured. _Loop._—The projection under the barrel to which the fore end is fastened. See barrel loop. They are of two kinds, wire and bolt loop. _Long Fire._—When a noticeable space of time intervenes between the striking of the hammer and the explosion of the charge, hence the term, the gun has made “long-fire.” _Lower Rib._—The rib underneath and between the barrels of a shot gun. _Lump._—The iron piece soldered to the barrel of a breech-loader, which descends into the action and is there secured preparatory to firing. _Magazine Rifle._—A rifle provided with an interior magazine for containing cartridges, and so made that they are passed automatically into a chamber ready for firing. _Mainspring._—The large spring in the gun-lock which imparts action and power to the hammer.