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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  • On Sale
    New - HKP .45 ACP - Titanium Thread Protector - Threaded 16x1 LH - HKP-22036 HK UMP Thread Protector - 16x1 LH - Titanium
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    HK UMP Thread Protector - 16x1 LH - Titanium

    H&K Heckler & Koch

    Now: $11.95
    Was: $23.95
    HKP .45 ACP Titanium Thread Protector - Threaded 16x1 LH US-made thread protector for firearms chambered in .45 ACP, threaded 16x1 left hand. Compatible With: HK UMP/USC HK45/HK45T HK45C/HK45CT HK USP 45/USPT 45 HK USPC 45/USPCT 45 B&T APC45 B&T...
    Now: $11.95
    Was: $23.95
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    Now: $11.95
    Was: $23.95
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  • Out Of Stock
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    New - H&K HK MR556 A4 16.5" Barrel - HKP-21931 HK416 A5, MR556 A4 Barrel - 5.56 / .223 - 16.5"

    HK416 A5, MR556 A4 Barrel - 5.56 / .223 - 16.5"

    H&K Heckler & Koch

    Now: $350.95
    Was: $389.95
    H&K HK MR556 A4/A5 16.5" Barrel This 16.5" factory H&K MR556 A4 barrel is cold hammer-forged from high-quality steel for exceptional durability, accuracy, and longevity. Manufactured to Heckler & Koch’s exacting standards, it features a...
    Now: $350.95
    Was: $389.95
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    Was: $389.95
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  • Out Of Stock
    On Sale
    New - H&K HK MR556 A4 Gas Block - Complete - HKP-21928 HK MR556 A4 Gas Block - Complete

    HK MR556 A4 Gas Block - Complete

    H&K Heckler & Koch

    Now: $214.16
    Was: $237.95
    H&K HK MR556 A4 Gas Block - Complete Factory HK MR556 A4 adjustable gas block ideal for switching between suppressed and unsuppressed firing.   Compatible With: HK MR556 A4 Nefarious Arms A5 barrels Features: Genuine H&K factory...
    Now: $214.16
    Was: $237.95
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    Now: $214.16
    Was: $237.95
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  • On Sale
    New - RCM HK P30L .40 to 9mm Conversion Barrel - Threaded - 13.5x1 - HKP-21788 HK P30L Conversion Barrel - .40 S&W to 9mm - Threaded - 13.5x1
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    HK P30L Conversion Barrel - .40 S&W to 9mm - Threaded - 13.5x1

    RCM

    Now: $193.45
    Was: $214.95
    RCM HK P30L .40 to 9mm Conversion Barrel - Threaded - 13.5x1 This 9mm conversion barrel is a drop-in replacement that allows your P30L to shoot the ubiqutous 9mm cartridge. Includes a thread protector. Each barrel is made from ordnance-grade steel,...
    Now: $193.45
    Was: $214.95
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    Now: $193.45
    Was: $214.95
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  • On Sale
    New - H&K MR556 A4/416 A5 2.5mm Gas Vent Screw - HKP-22056
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    HK416 A5, MR556 A4 Gas Vent Screw - 2.5mm

    H&K Heckler & Koch

    Now: $26.95
    Was: $29.95
    H&K MR556 A4/416 A5 2.5mm Gas Vent Screw German 2.5mm gas vent screw for MR556 A4. Provides more venting than the factory-installed 1.3mm screw. Compatible With: HK MR556 A4 HK416 A5
    Now: $26.95
    Was: $29.95
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  • On Sale
    New - H&K MR762 A4 1.1mm Gas Vent Screw - HKP-21946
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    HK MR762 A4 Gas Vent Screw - 1.1mm

    H&K Heckler & Koch

    Now: $29.66
    Was: $32.95
    H&K MR762 A4 1.1mm Gas Vent Screw German 1.1mm gas vent screw for MR762 A4. Provides less venting than the factory-installed 1.3mm screw. Compatible With: MR762 A4
    Now: $29.66
    Was: $32.95
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  • On Sale
    New - H&K MR762 A4 1.2mm Gas Vent Screw - HKP-21945
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    HK MR762 A4 Gas Vent Screw - 1.2mm

    H&K Heckler & Koch

    Now: $29.66
    Was: $32.95
    H&K MR762 A4 1.2mm Gas Vent Screw German 1.2mm gas vent screw for MR762 A4. Provides less venting than the factory-installed 1.3mm screw. Compatible With: MR762 A4
    Now: $29.66
    Was: $32.95
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    Was: $32.95
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  • On Sale
    New - RCM HK P30 & P30S 9mm Barrel - Non-Threaded - HKP-16687 HK P30, P30S Barrel - 9mm - 3.85" - Non-Threaded
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    HK P30, P30S Barrel - 9mm - 3.85" - Non-Threaded

    RCM

    Now: $185.63
    Was: $206.25
    RCM HK P30 & P30S 9mm Barrel - Non-Threaded   Each barrel is meticulously crafted from ordnance-grade steel, heat-treated, and finished with a durable nitride coating. This is the finest replacement barrel for the HK P30 9mm pistol, ideal as...
    Now: $185.63
    Was: $206.25
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    Now: $185.63
    Was: $206.25
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  • On Sale
    New - H&K HK USP .45 ACP Expert Barrel - Black - HKP-01525 HK USP Expert Barrel - .45 ACP
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    HK USP Expert Barrel - .45 ACP

    H&K Heckler & Koch

    Now: $359.95
    Was: $399.95
    HK USP .45 ACP Expert 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 use with an HK Comp Weight.
    Now: $359.95
    Was: $399.95
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    Now: $359.95
    Was: $399.95
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  • On Sale
    New - MM HK UMP 9mm Conversion Kit - HKP-02286 HK UMP Caliber Conversion to 9mm Kit - 7.87" Barrel - 30 Round Magazine
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    HK UMP Caliber Conversion to 9mm Kit - 7.87" Barrel - 30 Round Magazine

    Michaels Machines

    Now: $1,164.56
    Was: $1,293.95
    MM HK UMP, USC Conversion Kit - 9mm This 9mm conversion kit is designed for USC-to-UMP builds and allows existing .45 ACP conversions to be changed over to 9mm with a simple, drop-in parts swap. All components install in minutes and are built to...
    Now: $1,164.56
    Was: $1,293.95
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    Now: $1,164.56
    Was: $1,293.95
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  • On Sale
    New - Nefarious Arms HK MR556 A3 & 416 A5 Barrel Nut - HKP-22082 HK416 A5, MR556 A3 Barrel Nut
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    HK416 A5, MR556 A3 Barrel Nut

    Nefarious Arms

    Now: $35.96
    Was: $39.95
    Nefarious Arms HK MR556 A3/416 A5 Barrel Nut Whether replacing a barrel nut or sourcing the best parts for your build, the Nefarious MR556/416 barrel nut is an excellent option.  Meticulously crafted in the US to the highest quality standards...
    Now: $35.96
    Was: $39.95
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    Was: $39.95
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  • Out Of Stock
    On Sale
    New - H&K MR556 A4/416 A5 2.2mm Gas Vent Screw - HKP-22053

    HK416 A5, MR556 A4 Gas Vent Screw - 2.2mm

    H&K Heckler & Koch

    Now: $26.95
    Was: $29.95
    H&K MR556 A4/416 A5 2.2mm Gas Vent Screw German 2.2mm gas vent screw for MR556 A4. Provides more venting than the factory-installed 1.3mm screw. Compatible With: HK MR556 A4 HK416 A5
    Now: $26.95
    Was: $29.95
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    Now: $26.95
    Was: $29.95
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