Adjective : a single-action revolver.    From Dictionary.com. 

A big halibut on a old-school single-action reel gets my vote.    From Wordnik.com.  [Bass Have Glass Jaws] Reference

She pulled out a scratched single-action, small-caliber revolver.    From Wordnik.com.  [SEASONS OF GOLD] Reference

I only fire it single-action, but Bob tries both single & double-action.    From Wordnik.com.  [dogsolitude Diary Entry] Reference

I would get a single-action Ruger "Blackhawk" or "Super Blackhawk" in 44 mag.    From Wordnik.com.  [I'm looking to get a handgun. It will be my first one.] Reference

The reason for getting a single-action is they seem to handle recoil much better.    From Wordnik.com.  [I'm looking to get a handgun. It will be my first one.] Reference

These are very small 5-shot, single-action revolvers in polished stainless steel.    From Wordnik.com.  [The Volokh Conspiracy » Women’s (or Men’s) Concealed Carry Handgun Recommendations:] Reference

It marked the return of the single-action centerfire revolver as a viable firearm.    From Wordnik.com.  [The 50 Best Guns of All Time] Reference

Ann sighed and smiled ruefully, then retrieved the Colt Army single-action pistol.    From Wordnik.com.  [Time Scout]

The same cannot be said of the single-action auto pistol carried cocked and locked.    From Wordnik.com.  [Are there bouble action semi-autos] Reference

The Pfeifer single-action revolver is chambered for the .600 Nitro Express cartridge.    From Wordnik.com.  [And Now, A Really Manly Handgun] Reference

Like the fear system, it's a single-action driver, but positive rather than negative.    From Wordnik.com.  [Jonathan F.P. Rose: Oval Office Speech Only a Start] Reference

There are the different finishes and whether its a double or single-action to look at.    From Wordnik.com.  [I swore I'd never buy a Taurus...] Reference

He fires the rest of the ammo single-action saying he prefers the shorter trigger pull.    From Wordnik.com.  [dogsolitude Diary Entry] Reference

With the Single-Six a success, Sturm, Ruger announced the Blackhawk single-action revolver.    From Wordnik.com.  [The 50 Best Guns of All Time] Reference

# Safety Intercept Notch – When the trigger is pulled; there is some travel even in single-action stage.    From Wordnik.com.  [Matthew Yglesias » Oscar Grant] Reference

The New Vaquero's Old West look and modern mechanics made it an instant hit with single-action revolver fans.    From Wordnik.com.  [New Guns: Six Huntable Handguns for 2006] Reference

The front sight had a gold bead on it, and the single-action and hair trigger worked as smoothly as a fine watch.    From Wordnik.com.  [To The Bright and Shining Sun] Reference

A friend of mine, a former Soviet olympic pistol team member, put 3 rounds in the X-ring at 25 yards, one handed, single-action.    From Wordnik.com.  [The Hardest Kicking Cartridges] Reference

Behavior researchers call this the "single-action bias.".    From Wordnik.com.  [Watts Up With That?] Reference

He has a Ruger Vaquero single-action handgun at his side.    From Wordnik.com.  [Life and style | guardian.co.uk] Reference

He manipulates his single-action weapon fast enough, however.    From Wordnik.com.  [The Mountains] Reference

It was a short-barreled Colt single-action in almost new factory condition.    From Wordnik.com. Reference

"Three single-action Colt's revolvers, with the heavier, or American pattern of cartridge.".    From Wordnik.com.  [King Solomon's Mines] Reference

Let me see you de-cock that single-action revolver again. ".    From Wordnik.com.  [Time Scout]

Under control of a single-action ordering component of the server system, receiving the request.    From Wordnik.com.  [The 271 Patent Blog] Reference

"'Smith and Wesson' single-action," he said.    From Wordnik.com.  [The Luck of the Mounted A Tale of the Royal Northwest Mounted Police] Reference