Heckler & Koch Mark 23 - Overview

Overview

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 firearm have the writing "MK23 USSOCOM" engraved on the slide.

The MK23 is considered a match grade pistol, and is capable of making a 2-inch (51 mm) group at 50 yards (46 m), 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 polygonal 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 firearm 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 yet is subsonic making it suitable for use with a suppressor. Additionally, its shared design characteristics with the Colt M1911 pistol have made it easy for people who have experience with a 1911 to field strip and properly clean the MK23.

However, the firearm's large size and weight have resulted in some criticism. As the handgun was designed for offense rather than defense, the size and weight would help retain higher accuracy, but this also decreased its ease of use, comfort, and draw speed in defensive situations which require a more conventional, compact pistol. 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. It uses a different suppressor (due to left handed threading, as opposed to right-handed on the Mk23). An even more compact pistol than the USP Tactical for counter-terrorist and special forces use is the new HK USP Compact Tactical, which also has its own optional LAM. The USP-CT is lighter and is also capable of fitting a suppressor, making it a prime choice for Special Forces on covert operations. Recently, HK has also developed the HK 45, a much more contoured pistol based on the P2000, P8 and P30 models.

The proposed 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.