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 - RCM HK MP5K .40 S&W Barrel - Threaded 14x.75 - 3-Lug - HKP-21585 HK MP5K Barrel - .40 S&W - Threaded 14x.75 with 3 Lug
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    HK MP5K Barrel - .40 S&W - Threaded 14x.75 with 3 Lug

    RCM

    $279.95
    RCM HK MP5K .40 S&W Barrel - Threaded 14x.75 - 3-Lug This is the ultimate US-made barrel for any new or conversion build for the MP5K .40 cal. Crafted from top-grade CHF 41v40 material, it’s machined to impeccable standards. With the correct...
    $279.95
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    New - HK G36E Barrel - HKP-19273 HK G36E Barrel - 5.56 / .223 - 19"

    HK G36E Barrel - 5.56 / .223 - 19"

    USA

    $499.95
    Barrel - USA - HK G36E Brand new HK G36E barrel. Specifications: Barrel length 19"
    $499.95
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    New - RCM HK VP40 .40 S&W Tactical Barrel - Threaded 9/16x24 - HKP-17370 HK VP40 Tactical Barrel - .40 S&W - 4.45" - Threaded 9/16x24

    HK VP40 Tactical Barrel - .40 S&W - 4.45" - Threaded 9/16x24

    RCM

    $212.50
    RCM HK VP40 .40 S&W Tactical Barrel - Threaded 9/16x24 Each barrel is meticulously crafted from ordnance-grade steel, heat-treated, and finished with a durable nitride coating. This is the finest threaded barrel for the HK VP40 .40 S&W pistol,...
    $212.50
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    New - H&K HK VP9 to HK VP9 Long Slide Conversion Kit - Black - HKP-19040 HK VP9 to HK VP9 Long Slide Conversion Kit

    HK VP9 to HK VP9 Long Slide Conversion Kit

    H&K Heckler & Koch

    $0.00
    H&K HK VP9 to HK VP9 Long Slide Conversion Kit - Black   Compatible With: HK VP9 Features: Slide assembly with rear serrations, charging supports, and forward serrations / lightening cuts O-ring enhanced barrel, optimized and fit for...
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  • Used - H&K HK USC 45 Barrel - Used - HKP-20471 HK USC 45 Barrel - .45 ACP - Used
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    HK USC 45 Barrel - .45 ACP - Used

    H&K Heckler & Koch

    $695.95
    Barrel - HK USC 45 in Exc + shape HK German factory USC 45 barrel in excellent + condition. Rare and hard to find. 
    $695.95
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  • New - H&K MP5 .40 S&W Factory Barrel - Threaded - 3-Lug - HKP-19349 HK MP5 Barrel - .40 S&W - Threaded with 3 Lug - Factory
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    HK MP5 Barrel - .40 S&W - Threaded with 3 Lug - Factory

    H&K Heckler & Koch

    $1,495.00
    H&K MP5 .40 S&W Factory Barrel - Threaded - 3-Lug New MP5 .40 S&W barrel. Factory-installed sight tower with sight/sling eyelets and factory finish. Specifications: Threaded 3-Lug Compatible With: HK MP5 .40 S&W Rare & hard to find...
    $1,495.00
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    $1,495.00
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  • Out Of Stock
    New - H&K HK USP .45 ACP Barrel - Match - Black - HKP-17508 HK USP Barrel - .45 ACP - 6.02" - Match

    HK USP Barrel - .45 ACP - 6.02" - Match

    H&K Heckler & Koch

    $0.00
    H&K HK USP .45 ACP Barrel - Match The real deal factory HK Match barrel. This barrel will fit all HK USP .45 full size models. If you want a longer barrel for your HK USP 45 or USP 45 Tactical this is a great option for an extended length or for use...
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    New - H&K USP 9mm Tactical Barrel - Threaded 13.5x1 LH - HKP-00797 HK USP Tactical Barrel - 9mm- Threaded 13.5x1 LH

    HK USP Tactical Barrel - 9mm- Threaded 13.5x1 LH

    H&K Heckler & Koch

    $0.00
    Heckler and Koch HK USP 9mm Tactical Barrel - Threaded 13.5x1 LH This barrel is a drop-in replacement barrel for standard full-size USP 9mm Pistols. Cold hammer forged, polygonal rifled, and made in Germany. Specifications: Threaded 13.5x1 LH Overall...
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    New - H&K MR556 & HK416 (5.56x45/.223) Upper Conversion Kit - Threaded 1/2x28 - HKP-17877 HK416, MR556 Upper Conversion Kit - Threaded 1/2x28, - 5.56x45 / .223

    HK416, MR556 Upper Conversion Kit - Threaded 1/2x28, - 5.56x45 / .223

    HKP HK Parts

    $699.95
    H&K MR556 & HK416 (5.56x45/.223) Upper Conversion Kit - Threaded 1/2x28 Finally an answer for all of those that have been wanting a 14.5" upper for an HK416 or MR556. This conversion kit adds an upper or a barrel option for your MR556, CR556...
    $699.95
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    New - HKP HK MR556/416 Upper 9" 416C Style Conversion Kit - HKP-18674 HK416, MR556 Upper 9" 416C Style Conversion Kit

    HK416, MR556 Upper 9" 416C Style Conversion Kit

    HKP HK Parts

    $899.95
    MR556 & HK416 Upper Conversion Kit - 9" - 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 9" barrel conversion kit for 416 or MR556. Each conversion kit upper or barrel...
    $899.95
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    New - HKP HK MR556/416 9" HK416C Style Barrel Conversion Kit - HKP-18401 HK416, MR556 Barrel Conversion Kit - 9" - HK416C Style

    HK416, MR556 Barrel Conversion Kit - 9" - HK416C Style

    HKP HK Parts

    $0.00
    MR556 & HK416 Barrel Conversion Kit - 9" - 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 9" barrel conversion kit for 416 or MR556. Each conversion kit upper or barrel...
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    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

    $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...
    $999.95
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