MK23 Barrels

O-Ring for .45 caliber barrels HK introduced O-rings with the HK Mark 23 and HK USP 45 Tactical pistols. Features: Original green color no longer in production Same high-temperature rubber as the newer black O-rings Factory part that provides the seal...

HKP HK .45 Barrel O-Ring All Caliber Pistols - Red A rare find as we have found a small lot of HK red-colored HK .45 O-rings.  All HK O-rings are still made of the same material as the newer black O- rings only in the HK red color. A great spare and...

Heckler and Koch .45 ACP Caliber Barrel O-Ring in Black A great spare and a much-needed part for your HK barrel. This factory part is a high-wear item, as the O-ring provides the seal between the slide and the barrel, which provides a secure lockup with...

New factory HK Mark 23 SOCOM thread protector This is the only thread protector that HK offers that will fit the HK Mark 23 Pistol. This is a hard-to-find item and a must-have for all MK23 Owners. Compatible With: All H&K Mark 23/ SOCOM barrels...

RCM HK Mark 23 .45 ACP Flush Fit Barrel - Non-Threaded This custom-made barrel is expertly crafted from ordnance-grade steel, heat-treated, and finished with a highly desirable nitride coating. Designed specifically for the HK Mark 23 .45 pistol, it...

RCM HK Mark 23 .45 ACP Tactical Barrel - Threaded .578x28 RH This HK Mark 23 tactical threaded barrel designed for compatibility with various flash hiders and sound suppressors. Unlike the factory HK Mark 23 barrel with 16x1 RH threads, this barrel...

RCM HK Mark 23 .45 ACP Barrel - Non-Threaded Each barrel is meticulously crafted from ordnance-grade steel, heat-treated, and finished inside and out with an ultra-desirable nitride coating. This is the finest replacement barrel available for the HK Mark...

HKP HK Mark 23 .45 ACP Thread Protector - Threaded 16x1 RH Specifically designed for all H&K Mark 23/SOCOM barrels threaded 16x1 RH, this essential accessory offers superior protection for your threaded barrel. Featuring a durable nitride...

H&K Mark 23 .45 ACP Barrel - Threaded 16x1 RH A great replacement item for a now out-of-production pistol. New HK German mark 23 barrel threaded with the factory correct 16x1 RH thread. Get that replacement or factory new spare barrel while they are...

RCM HK Mark 23 .45 ACP Tactical Barrel - Threaded 16x1 LH   US-made HK Mark 23 tactical threaded barrel designed for use with a wide variety of flash hiders and sound suppressors. Unlike the factory HK Mark 23 barrel with 16x1 right-hand...

H&K Mark 23 .45 ACP Thread Cap - Threaded 16x1 RH Introducing the new US HK Mark 23 SOCOM Thread Protector, designed for all H&K Mark 23/SOCOM barrels threaded 16x1 RH. This essential accessory protects your valuable threaded barrel and...

RCM HK Mark 23 .45 ACP Tactical Barrel - Threaded 16x1 RH US made HK Mark 23 tactical threaded barrel for use with a wide variety of flash hiders & sound suppressors.  Specifications: Made In The USA Double Stress Relieved Nitrided Finish To...