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

001 Ssocom W Cover 01
001 Ssocom W Cover 01

Review: SAR USA SAR9 SOCOM Compact

The SAR9 SOCOM Compact from SAR USA packs popular tactical features into a compact package.

A Jakl In Bullpup Clothing: Palmetto State Armory's Olcan

Palmetto State Armory adapted its piston-driven Jakl rifle design into a bullpup configuration it calls the Olcan.

150,000 NFA Applications Filed On Day 1 After $0 Tax Stamp Becomes Official

Approximately 150,000 NFA enthusiasts filed their paperwork through ATF’s electronic system in just the first 24 hours of 2026, the first day after the $0 tax stamp for most NFA items became official.

Gun Of The Week: Caracal USA CMP9K

Caracal's CMP9K pistol is based on a design originally produced to replace the aging stock of Heckler & Koch MP5s in United Arab Emirates service.

The Armed Citizen® Jan. 9, 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.

Preview: Roundhouse Provisions Ultimate Campout Kit

Founded by Chuck Norris (yes, that Chuck Norris), Roundhouse Provisions is a company that produces emergency foodstuffs designed to be quickly and simply prepared that will stay fresh for years.

Interests



Get the best of American Rifleman delivered to your inbox.