Barrels

Barrels

Premium HK Barrels and Firearm Parts to upgrade your HK firearm with precision-engineered, CHF (Cold Hammer Forged) barrels, and premium parts built for reliability, unparalleled accuracy, and long-term performance. Our OEM and aftermarket HK barrels deliver exceptional quality and fit for pistols, rifles, and submachine guns.

Key Features:

  • CHF (Cold Hammer Forged) construction for unmatched durability and precision
  • Engineered for superior accuracy and shot consistency
  • Made from premium, corrosion-resistant materials
  • Designed for performance, competition, and tactical applications
  • OEM fit and easy installation across multiple HK platforms

Enhance your HK pistol or rifle with the best high-performance CHF barrels engineered for excellence, trusted by professionals  and firearm enthusiasts.

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  • New - H&K HK G36 15.4" CQB Barrel Assembly - Black - HKP-17026 HK G36, CQB Barrel Assembly - 5.56 / .223 - 15.4"
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    HK G36, CQB Barrel Assembly - 5.56 / .223 - 15.4"

    H&K Heckler & Koch

    $1,095.95
    Factory German HK G36 CQB Barrel Assembly - New Brand new HK German cold hammer forged barrel assembly, date coded, uninstalled & unfired in the factory wax paper wrapping. Each barrel assembly uses the standard G36/SL8 piston rod assembly so the...
    $1,095.95
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    $1,095.95
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  • Out Of Stock
    On Sale
    New - RCM Schneider PSG-1 Barrel - HKP-21193 HK PSG-1 Barrel - 7.62 / .308 - 25.5"

    HK PSG-1 Barrel - 7.62 / .308 - 25.5"

    RCM

    Now: $764.96
    Was: $849.95
    RCM Schneider PSG-1 Barrel Only the finest blanks in the industry can produce the best results on the range. Schneider Barrel Company makes that blank. This barrel will work perfectly with standard G3/91 trunnions, G3 barrel extensions, or...
    Now: $764.96
    Was: $849.95
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  • Out Of Stock
    On Sale
    New - MM HK UMP 9mm Conversion Kit - 16 inch Barrel - HKP-02284 HK UMP Caliber Conversion to 9mm Kit - 16.5" Barrel - 30 Round Magazine

    HK UMP Caliber Conversion to 9mm Kit - 16.5" Barrel - 30 Round Magazine

    Michaels Machines

    Now: $800.96
    Was: $889.95
    HK UMP 9mm Conversion Kit - US-Made UMP/USC conversion kit will convert existing USC-UMP conversions to 9mm. This is a simple drop-in conversion for those who have already done the USC-UMP conversion. The conversion parts are drop-in, with the total swap...
    Now: $800.96
    Was: $889.95
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    Now: $800.96
    Was: $889.95
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  • Out Of Stock
    On Sale
    New - H&K HK P9S 9mm Barrel - HKP-17655 HK P9S Barrel - 9mm

    HK P9S Barrel - 9mm

    H&K Heckler & Koch

    Now: $809.96
    Was: $899.95
    H&K HK P9S 9mm Barrel No longer made or available. Last call on this rare and no longer made offering. We have the last of these barrels to ever be offered.
    Now: $809.96
    Was: $899.95
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  • Used - H&K UMP (.40 S&W) Conversion Kit - Used - HKP-00729 HK UMP (.40 S&W) Conversion Kit - Used
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    HK UMP (.40 S&W) Conversion Kit - Used

    H&K Heckler & Koch

    $1,087.95
    HK UMP .40 Caliber Conversion Kit This UMP conversion kit provides the necessary components to convert .45 sub-guns to .40 caliber. Machined bolt carriers are available for USC/UMP conversion sub-guns. This is a simple, drop-in conversion requiring a...
    $1,087.95
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    $1,087.95
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  • On Sale
    New - MM HK UMP (.40 S&W) Conversion Kit - HKP-18754 HK UMP Caliber Conversion to .40 S&W Kit - 7.87" Barrel - 30 Round Magazine
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    HK UMP Caliber Conversion to .40 S&W Kit - 7.87" Barrel - 30 Round Magazine

    Michaels Machines

    Now: $899.96
    Was: $999.95
    HK UMP 40 Caliber Conversion Kit With this UMP Conversion kit, UMP .45 sub guns can be converted to .40 caliber. Machined bolt carriers are available for USC/UMP conversion sub guns. This is a simple drop-in conversion. The time required to change...
    Now: $899.96
    Was: $999.95
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  • New - H&K HK MP5/SP5 3 Lug Barrel - New Old Stock - Rare - HKP-21662 HK MP5, SP5 Barrel - 9mm - Threaded with 3 Lug - New Old Stock - Rare
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    HK MP5, SP5 Barrel - 9mm - Threaded with 3 Lug - New Old Stock - Rare

    H&K Heckler & Koch

    $987.95
    H&K HK MP5/SP5 3 Lug Barrel - New Old Stock - Rare Factory German date coded with H&K logo. This new old stock 3-lug threaded item is incredibly rare and in pristine condition. An absolute gem in the market. We only have a limited number...
    $987.95
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    $987.95
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  • Out Of Stock
    On Sale
    New - HKP HK MR556/416 Upper 8" 416C Style Conversion Kit - HKP-18629 HK416, MR556 Upper 8" 416C Style Conversion Kit

    HK416, MR556 Upper 8" 416C Style Conversion Kit

    HKP HK Parts

    Now: $1,028.76
    Was: $1,285.95
    Upper Conversion Kit for HK416 and MR556 8 inch barrel - HK 416C Style Finally an answer for all of those that have been wanting as close to the original, rare unicorn of a find HK 416C 8" barrel conversion kit for 416 or MR556. Each conversion kit...
    Now: $1,028.76
    Was: $1,285.95
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  • On Sale
    New - HK MR556 16" Complete Upper Barrel - HKP-21805 HK MR556 Barrel - 5.56 / .223 - 16" - Complete Upper
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    HK MR556 Barrel - 5.56 / .223 - 16" - Complete Upper

    H&K Heckler & Koch

    Now: $890.96
    Was: $989.95
    HK MR556 16" Complete Upper Barrel Factory HK MR556 16" barrel, complete with a factory-installed barrel nut, gas block and flash hider. Every component is brand new and meticulously crafted, guaranteeing top-notch quality. This barrel is the ultimate...
    Now: $890.96
    Was: $989.95
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  • Out Of Stock
    On Sale
    New - HKP/H&K UMP 9mm Conversion Kit - Threaded Barrel 1/2x28 - 3-Lug - HKP-02285 HK UMP, USC Kit - Caliber Conversion - 9mm - 30 Round

    HK UMP, USC Kit - Caliber Conversion - 9mm - 30 Round

    HKP HK Parts

    Now: $799.96
    Was: $999.95
    HK Parts and Heckler and Koch HK UMP and HK USC 9mm Conversion Kit - Threaded Barrel 1/2x28 - 3-Lug This UMP, USC conversion kit will convert existing conversions to 9mm. This is a simple drop-in conversion for those who have already done the USC-UMP...
    Now: $799.96
    Was: $999.95
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    Now: $799.96
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