Merwin, Hulbert Folding Hammer

by
posted on June 22, 2011
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
wiley-clapp.jpg

One of those odd guns that has always caught my fancy is the Merwin, Hulbert revolver and one of its more intriguing feature has recently got me “what-if-ing” again. The Merwins are a series of handsome revolvers made during the Frontier era in three sizes and several calibers. Known for their unusual twist-and-pull system of selective ejection, the Merwins were a popular gun in their day, selling slightly behind Colt, S&W and Remington wheelguns.

An optional feature on many of the models was an ingenious folding hammer. Actually this was really a folding hammer spur. In this system, the rearmost extension of the hammer—the checkered part that you put your thumb on to cock the action—was a separate piece of steel. Held in its extended position by a tiny leaf spring, the unusual hammer spur offered the shooter a means of cocking the gun's DA/SA action. Defensive revolvers are most commonly fired by means of the DA trigger, with a long-arc pull of 9 or 10 pounds of pressure. There are times when cocking the action for a more precise shot in SA style with 3 or 4 pounds is desirable. This is the nature of the DA/SA revolver.

Carrying a little gun like this is made easier by the folding hammer. It hinges forward in such a way that the spur snugs down against the body of the hammer, completely out of the way and not likely to snag on pocket edges or coat linings. If you need to use it, you catch the tip with your thumb nail and bring the hammer to full cock. Trigger pressure will release the hammer and fire a shot, but something else also happens. Inertia causes the hammer spur to fold closed when the hammer strikes the frame. You'll have to unfold it to manually cock the action, but as long as you are happy with DA shooting, the folding spur will stay folded and out of the way. Could this system be applied to a modern gun? My fellow gunwriter and shooting buddy Walt Rauch thinks so. He found a gunsmith that built one on a clean old Model 12 M&P Smith, and he now has a neat gun.

Latest

Mantis X Review 1
Mantis X Review 1

Review: Mantis TitanX Training System

You don’t have to go all the way to the range to enhance your shooting skills.

Radical Update: The Benelli M2-G1 Tactical Shotgun

For 2026, Benelli has given its tactical M2 shotgun a radical update with the new M2-G1 version.

President’s Column | President Meets President

I am quite certain, that for the first time in NRA history the President of the United States met with the NRA president, the NRA president asked for his support for national Right-to-Carry (NRTC), and then, on a national stage, President Trump called out the NRA president’s name and pledged his support for national Right-to-Carry legislation. But that’s exactly what happened at a rally near Allentown, Pa., in late June.

Gun of the Week: TriStar Arms KR.22

Semi-automatic .22 rifles have been a staple in the firearm marketplace for decades, and the TriStar Arms KR.22 brings yet another lightweight, affordable option that accepts Ruger 10/22 rotary magazines.

Political Report | Trump Reiterates National Right-to-Carry Support

I am repeatedly reminded of how critical it was that the NRA engaged early in supporting Donald Trump’s 2016 candidacy—and that he won. A recent example came in June, when President Trump spoke to American workers at a Mack Trucks facility in Macungie, Pa.

The Armed Citizen® Aug. 21, 2026

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

Interests



Get the best of American Rifleman delivered to your inbox.