“Recently the late John Newman of Seattle, Washington, and Elmer Keith of Weiser, Idaho, have given prominence to what is known as ‘slip shooting’ with the .45 Single Action Army. The gun is converted into a ‘slip hammer’ revolver by altering the hammer, taking off the hammer spur entirely and substituting for it a short peg projecting to the rear and lower down on the hammer than the conventional hammer spur. The trigger is preferably removed altogether and sometimes the triggerguard itself is also removed. The gun like this can be fired rapidly and accurately by simply drawing the hammer back with the right thumb and then, when it is ready to fire, allowing the handle of the ‘slip hammer’ to escape from under the thumb. The speed with which this can be accomplished is shown by the fact that John Newman has been known to throw a tin can in the air and put four shots into it with his ‘slip hammer’ Colt before it hit the ground.”
