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

FN SCAR 01
FN SCAR 01

FN Releases New SCAR Rifles & QD Suppressors

FN made headlines when it announced it would discontinue its legacy SCAR rifle platform in 2025, but for 2026, the design is back and better than ever.

Review: KelTec SUB2000 GEN3 In 10 mm

At long last, KelTec has answered customer requests for a more potent version of their folding pistol-caliber carbine with its SUB2000 GEN3 chambered for the 10 mm Auto cartridge.

Lowering Decibels For Less: Lyman's New Sonicore Suppressor Lineup

As 2026 shapes up to be the "Year Of The Suppressor," firearm manufacturers are racing their new designs to market, and one of the most affordable options out of the gate is Lyman Products' Sonicore line of suppressors.

Nighthawk Custom Releases Trio Of New Pistols For 2026

Ahead of SHOT Show 2026, Nighthawk Custom announced it would be releasing three new handguns, all built with the company's "One Gun, One Gunsmith" approach.

I Have This Old Gun: Remington Nylon 66

When Remington Arms wanted an inexpensive, mass-market .22 rifle, the company's designers departed from traditional manufacturing materials. The resulting Remington Nylon 66 emerged as an incredibly innovative, durable design that went on to be produced in great numbers.

Nevada, Missouri Law Enforcement Agencies Adopt Springfield Echelon

Police departments in Nevada and Missouri became the latest law-enforcement agencies to adopt the Springfield Armory Echelon 4.5F as their official duty pistol.

Interests



Get the best of American Rifleman delivered to your inbox.