A gun or a pistol.
1833. See SHOT-GUN.
1834. I will show you what it is for a terrier puppy to put a buck at bay. Ay, In spite of your silver mounted shooting-iron, eying the splendid rifle the young man held in his hand.H. J. Nott, Novellettes of a Traveller, ii. 175 (N.Y.).
1839. I have myself witnessed several of his successful shots with this unpretending shooting-iron, and once saw him knock the feathers from a wild duck at eighty or a hundred yards!C. F. Hoffman, Wild Scenes, i. 856 (Lond.).
1846. He said his old shooting iron would go off at a good imitation of a bears breathing!T. B. Thorpe, Bob Herring: A Quarter Race in Kentucky, etc., p. 135.
1847. The settlers generally conceded that his shooting-iron was particularly certain!Robb, Streaks of Squatter Life, &c., p. 117 (Phila.).
1853. Drop yer shootin iron, or yell git moren ye send; theres two agin one, my sonny.S. A. Hammett (Philip Paxton), A Stray Yankee in Texas, p. 51.