The Heckler & Koch Mark 23 is a large-frame semi-automatic pistol chambered in .45 ACP designed to deliver consistent, match-grade performance. This configuration includes a 5.87 inch threaded polygonal barrel, an olive drab green polymer frame, a black steel slide, and two 12-round magazines. The pistol incorporates HK’s recoil reduction features and an O-ring barrel seal to support consistent barrel lockup.
Key Specifications
- The pistol is chambered in .45 ACP.
- The barrel measures 5.87 inches and is a threaded polygonal barrel.
- The action is Double Action/Single Action (DA/SA) semi-automatic.
- The magazine capacity is 12 rounds.
- The package includes 2 magazines, each specified as 12-round.
- The frame material is polymer in an olive drab green finish.
- The slide finish is specified as black steel.
- The barrel threading is specified as 16×1 RH.
- The sights are specified as fixed (white 3-dot reported in product data).
The Mark 23 is configured for accuracy and durability with features intended for demanding duty and precision use: a polygonal, O-ring-sealed barrel for consistent lockup, a robust steel slide, and a polymer frame with an accessory rail. Its included magazines and threaded barrel make it suitable for owners planning to use suppressors or other muzzle devices that require standard thread interfaces.
Product information is supplied by the manufacturer and/or distributor and may be automatically formatted or enhanced using AI for clarity and consistency. While we strive for accuracy, specifications, features, and included items may change without notice. Always verify details using the manufacturer’s official documentation and the information shown on this product page before purchase or use.




