Heckler & Koch Mark 23

by
posted on April 30, 2022
** 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. **
Heckler & Koch Mark 23 pistol handgun right-side view black gun USSOCOM issue military weapon

In the late 1980s, a U.S. Special Operations Command survey found more than 100 different close-quarters small arms configurations were fielded by American troops at the time. That kind of diversity is a logistical nightmare when it comes to field maintenance and repair. An effort to find a standardized pistol to remedy the problem launched shortly after results were published.

Heckler & Koch began developing its Mark 23 in response, with the first models coming out of the factory in 1991. Wearing an Insight Technology laser aiming device and Knight’s Armament suppressor, it won the USSOCOM competition and was officially issued in 1996. Special forces received it under the military label Mk 23. It is one of the few .45 ACP-chambered semi-automatics to enter U.S. military service since the venerable 1911.

Law-abiding citizens can own the handgun, which sells as the Mark 23 on the civilian market. It doesn’t come wearing the suppressor or laser, but it still packs the same match-grade performance and “thrivability” through conditions under which other guns to surrender.

The threaded barrel measures 5.87" and the semi-auto’s overall length comes in at 9.65". Width is 1.53" and it weighs 39.36 ozs.

The double-action/single-action comes with a match-grade trigger and its safety and magazine release are ambidextrous. The left side of the polymer frame has a decocking lever and the machined steel slide, in keeping with the military mission, is one-piece. The extractor does double duty, serving as a loaded-chamber indicator and accessories can mount on the dustcover rail.

As for reliability, the Heckler & Koch website explains during USSOCOM testing, “Endurance testing demonstrated a service life of over 30,000 rounds of +P ammunition. To meet the reliability requirement, the pistol had to demonstrate a minimum of 2,000 mean rounds between stoppages (MRBS) with both M1911 ball and +P ammunition. All pistols exceeded the 2000 MRBS with an average of 6000 MRBS.” Accuracy average 1.44" at 25 meters.

Sights are fixed with a square notch at the rear and contrasting points. The pistol ships with either 10- or 12-round magazines (two of them) and MSRP is $2,639.

Latest

TNW Firearms ASR 1911
TNW Firearms ASR 1911

Review: TNW Firearms ASR 1911

Reliable pistol-caliber carbines, especially with quick-caliber-change capability, are fun, and the ASR 1911 from TNW Firearms is one of the most unique of the bunch.

GOEX Resumes Black Powder Production

Voyager Technologies announced on Sept. 8 that the GOEX plant in Camp Minden, La.—the sole black powder manufacturing facility located in the United States—has been modernized and is back in production.

Today’s Makers of Yesterday’s Firearms

Original firearms from the American Revolution era are valuable and best preserved for posterity. For those who want to shoot them, several modern makers offer quality reproductions.

Left Turn (Bolt): Tikka's New Left-Handed T3x Ace Rifles

Lefties of the world unite and rejoice, as Tikka has announced left-hand versions of its award-winning T3x Ace chassis rifles.

The Armed Citizen® Sept. 14, 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.

Skills Check: Rifle Standard Delta 2

Carbine performance is all about maintaining control. The Rifle Standard Delta 2 is a drill that pressures recoil control, visual discipline and cadence as distance decreases and time compresses.

Interests



Get the best of American Rifleman delivered to your inbox.