- Heckler & Koch Mark 23
name=MK23 Mod 0
caption= Mark 23 with suppressor and laser aiming module (LAM)
.45 ACP(AA18, A475)
action=Short recoil, DA/SA
KSK, GSG-9, GROM
Heckler & Koch
variants= Mark 23 (civillian market, law enforcement only)
- 1.21 kg (2.7 lb), empty
- 1.47 kg (3.2 lb), loaded
- 2.29 kg (5.0 lb), loaded, with
- 245 mm (9.5 in), without suppressor
- 421 mm (16.5 in), with suppressor
part_length=149 mm (6 in)
feed=12-round detachable box magazine
The Heckler & Koch MK23 Mod 0 is a
handgunconsisting of a match gradesemi-automatic pistol, a laser aiming module (LAM), and suppressor. It was adopted by the United States Special Operations Command(USSOCOM) for special operationsunits in the 1990s.
While the designation applies to the complete system, it also commonly used in reference to the pistol component itself. The pistol itself, chambered for the
.45 ACPcartridge, was developed by Heckler & Koch, and was selected over the Colt OHWSthrough USSOCOM's Offensive Handgun Weapon System (OHWS) program. The LAM and suppressor were developed by Insight Technologyand Knight's Armament Company(KAC), respectively.
The MK23 Mod 0 was built as an "offensive" handgun for U.S. special operations forces under USSOCOM, as per request made in 1989. Military versions of the weapon have the writing "MK23 USSOCOM" engraved on the slide.
The MK23 is considered a
match gradepistol, and is capable of making a 2 inch group at 50 yards, roughly 4 MOA. Production began in 1991, and it was the basis for the HK USP, which began production in 1993. The MK23 has exceptional durability in harsh environments, being waterproof and corrosion-resistant. It uses a hexagonal barrel design, which is reported to improve accuracy and durability. It also features an ambidextrous safety and magazine release on both sides of the frame. The magazine release is at the rear edge of the trigger guard, which is wide enough to allow the use of gloves. A decocking lever is on the left side, which will silently lower the cocked hammer. The MK23 is part of a larger weapon system that includes an attachable laser aiming module, a suppressor, and some other features such as a special high-pressure match cartridge (.45 +P ammunition).
The weapon was tested and found to be capable of firing tens of thousands of rounds without a barrel change. It remains reliable in harsh conditions, making it suitable for use by
special forces. The .45 ACP round has considerable stopping power, and retains that stopping power even when suppressed.
However, the weapon's large size and weight have resulted in some criticism. In response, HK developed the USP Tactical pistol based on the original USP; the Tactical retains much of the performance of the MK23 without the bulky size, and is able to use the suppressor though not the LAM. An even more compact pistol than the USP Tactical for counter-terrorist and special forces use is the new HK USP Compact Tactical, which does have its own optional LAM. The USP-CT is lighter and is capable of fitting a suppressor, making it a prime choice for Special Forces on covert operations.
Joint Combat Pistol(JCP) was intended to accept match grade and +P ammunition. However, it is not clear if the JCP, which absorbed the earlier SOF Combat Program, will be used alongside or replace the MK23 handguns. As of 2006, the JCP has since been renamed and restructured.
Offensive Handgun Weapon System
The MK23 was submitted to the USSOCOM Offensive Handgun Weapon System (OHWS) competition around late 1991 the goal of which was to create an entire pistol package capable of replicating the performance of longer barreled weapons such as submachine guns with many customizable features. Its rival was the
Colt OHWS. Though both Heckler & Koch's and Colt's designs were tailored to the demanding requirements of the OHWS competition, the MK23 eventually won.
HK commercially markets the MK23 and derivatives of it, but not the complete SOCOM system. The suppressor is made by Knight's Armament Company, and was selected over the one HK originally included as part of its entry. Insight Technology won the contract to produce the laser aiming module, later designated
AN/PEQ-6. One version of the LAM produces a visible light dot, while another produces an infrareddot that can only be seen through night vision goggles. There have since been different LAM models and, at least commercially, different suppressors as well.
The first MK23 production models were delivered to SOCOM on May 1, 1996. At last count, 1,986 models were built (serial numbers 23-0101 through 23-2086).
Civilian Mark 23
Heckler & Koch is offering the MK23 on the civilian market as the "Mark 23". It is distributed by its subsidiaries HK Inc. (
United States) and HKJS GmbH ( Germany).
The models for the U.S. market initially came with a 10-round magazine, to comply with the U.S. Assault Weapons Ban. The ban has now expired, and the civilian Mark 23 comes with the same 12-round magazine as the government variants. In
Canada, the Mark 23 pistol is still supplied only with 10-round magazines, as per the 1995 Firearms Act.
According to the "Operators Manual", [ [http://www.hk-usa.com/images/shared/mark23_man.pdf MK23 Operators Manual] ] there are few differences between the civilian Mark 23 and the government MK23. These differences are the slide engraving ("Mark 23" instead of "MK23 USSOCOM") and a barrel conforming to SAAMI headspace specifications.
Heckler & Koch USP, pistol based on the MK23.
Heckler & Koch, the manufacturer.
List of individual weapons of the U.S. Armed Forces
*"Jane's Guns Recognition Guide" by
Ian V. Hogg
* [http://www.heckler-koch.de/HKWebText/detailProd/1925/104/4/21 Official page]
* [http://www.kerensky.net/pdf/mark23_man.pdf MK23 operator's manual]
* [http://www.hkpro.com/socom.htm HKpro SOCOM page]
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