THE GUN GUY^®

Keep your powder dry! -- be ready for a fight (or anything harmful)
a flash in the pan -- Off to a good start but failed
hard as flint or flinty -- very tough
going off half-cocked -- not properly prepared for the task
primed and ready! -- all set to take on the task at hand
lock and load! -- be ready for action!
His daddy was a pistol and he's a son of a gun! -- Father was ready for any challenge and, too, was his son
triggerman -- responsible for shooting if necessary
[right] on target -- focused on the task at hand
dead-center -- has hit the "bullseye!"
trigger-happy -- acts too soon and too often; detrimental to the intent
lock, stock and barrel -- everything needed to function as designed
Is that a gun in your pocket, or are you just glad to see me? -- Maye West to W.C. Fields
at Gatling-gun tempo -- doing "something" at a quick/rapid pace
Top Gun! -- best of the best
quick on the trigger -- too fast to act; impulsive
at point-blank range -- too close to miss (this is actually an incorrect application by an ignorant public. "Point blank" refers to the actual distance at which the sights are regulated.
"gunning" for someone -- seeking a particular person upon whom to focus retribution.
pistol-whip -- physically beat someone using a handgun as a club
hair trigger will "go off" with the slightest provication
use enough gun From Robert Ruark -- be ready for the toughest challenge
call the shots - determine the results or intent of actions by others

These from "VitSnucins"
fast on the draw and/or quick on the draw - a long shot or misfire - reacts quickly
straight shooter - honest, not hypocritical
long shot - has a poor chance of success
in your sights - target of your concentration
loaded for bear - ready for the toughest challenge
raise your sights - set higher goals
off target - missing the point or intent
wild shot - a rash decision
hang fire - delay in taking action or making a decision
someone or something is a long shot - not likely to be successful
to be off target -- easily distinguished from "on target" - focused on goals --or not
someone is firing blanks -- B.S. or ineffective effort

These from the Cody Firearms Museum
armed to the teeth -- (a) heavily-armed person(s); (b) well-supplied with information or equipment
bite the bullet -- (a) prior to modern medical care, a wounded person [might] be given a lead bullet to bite down on while undergoing surgery to [help cope with] the pain; (b) to do something unpleasant in order t get it out of the way
grease gun -- (a) a tool used to squirt heavy grease into a bearing; (b) the nickname given the U.S. M3 submachine gun. [Note: many sources say the German MP40 "Schmeiser" submachine gun was nicknamed "grease gun" by U.S. troops while "burp gun" was a common nickname for the U.S. M3. -- Ed
gun-shy -- (a) frightened by the shooting of a firearm; (b) a timid person or animal
not worth the powder and shot -- something not worth much (powder and shot were pretty cheap in "the old days")
parting shot -- (a) the last discharge of a firearm, generally as you are escaping or leaving an area; (b) final remarks
ram it home -- (a) to push powder and ball down a muzzleloader; (b) to force something
riding shotgun -- (a) postion taken by an armed guard on an express wagon or coach; (b) riding as a passenger in the front seat [usually opposite the driver] of an automobile
shoot from the hip -- (a) quickly firing a pistol without aiming; (b) a rash statement or behavior
worm it out -- (a) using a rod-like tool used to remove an unfired ball from a muzzle loader; (b) to get a secret (information) out of someone