ClipArt ETC
"Gun. A, breech; B, barrel; C, band; D, breech-block; E, butt; F, butt- or heel-plate; G, front sight or bead; H, guard- or trigger-plate; I, guard-bow; K, hammer; L, lock; M, peep-sight; N, N, pipes; O, pistol-grip; P, rear sight; Q, receiver; R, side-screws or -nails; S, S, stock; T, tip; U, trigger; V, wiping-rod." -Whitney, 1911

Parts of the Gun

"Gun. A, breech; B, barrel; C, band; D, breech-block; E, butt; F, butt- or heel-plate; G, front sight…

"Nettling cells of Hydra. A, unexploded; B, exploded; b, barbs; c, the nettling cell in which the nettling organ is developed; cn., the cnidocil or "trigger"; cp., the capsule or nettling organ; f, the nettling filament or lasso; n, neck of the capsule; nu., nucleus of the cell." — Galloway

Hydra

"Nettling cells of Hydra. A, unexploded; B, exploded; b, barbs; c, the nettling cell in which the nettling…

The lever pressed by the finger to discharge a firearm.

Trigger Mechanism

The lever pressed by the finger to discharge a firearm.