Parts

Parts

At HK Parts, we offer a wide range of high-quality Heckler and Koch accessories and components for your favorite firearms. Whether you are upgrading a Heckler and Koch pistol or rifle, or building with parts kits, we have you covered. Explore top-rated components for VP9, USP, P30, MP5, MP5K, G36, HK416, and more. From triggers, barrels, and grips to magazines, stocks, and sights, find the parts you need to enhance performance, reliability, and function.

Popular upgrades include match triggers, threaded barrels, compensators, optic plates, and extended magazines. Rifle owners often add enhanced stocks, forearms, and ambidextrous controls.
MP5 and MP5K kits are top sellers, giving shooters authentic components for iconic builds. G36 and HK416 kits are also highly sought after by collectors and professionals alike.
HKP offers the world’s largest H&K-focused catalog, with better availability, faster fulfillment, and expert support compared to general retailers.

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  • On Sale
    Used - H&K USC (.45 ACP) Incomplete Trigger Housing - Gray - Used - HKP-16479-GY-B HK USC (.45 ACP) Incomplete Trigger Housing - Gray - Used
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    HK USC (.45 ACP) Incomplete Trigger Housing - Gray - Used

    H&K Heckler & Koch

    Now: $22.46
    Was: $39.95
    H&K USC (.45 ACP) Incomplete Trigger Housing - Gray - Used ONLY 1 UNIT AVAILABLE - AS PICTURED Used HK Germa
    HKP-16479-GY-B
    Now: $22.46
    Was: $39.95
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  • New - Franklin Armory/H&K 53/93 & AP53 Binary Trigger Group- SEF Contoured - HKP-22169-M HK93, HK53, AP53 Binary Trigger Group- SEF Contoured
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    HK93, HK53, AP53 Binary Trigger Group- SEF Contoured

    H&K Hechler & Koch / FA Franklin Armory

    $1,399.95 - $1,449.95
    Franklin Armory/H&K 53/93 & AP53 Binary Trigger Group- SEF Contoured US-made binary trigger group installed in a German SEF contoured trigger housing. Features a 3-position selector marked SEF. All...
    HKP-22169-M
    $1,399.95 - $1,449.95
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  • New - Franklin Armory/H&K 53/93 & AP53 Binary Trigger Group- 3 Position 2 Round Burst Engraved - HKP-22168-M HK93, HK53, AP53 Binary Trigger Group - 3 Position 2 Round Burst Engraved
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    HK93, HK53, AP53 Binary Trigger Group - 3 Position 2 Round Burst Engraved

    H&K Hechler & Koch / FA Franklin Armory

    $1,399.95 - $1,449.95
    Franklin Armory/H&K 53/93 & AP53 Binary Trigger Group- 3 Position 2 Round Burst Engraved US-manufactured binary trigger pack installed in a German SEF-style polymer housing engraved with 0, 1, 2...
    HKP-22168-M
    $1,399.95 - $1,449.95
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  • Used - H&K G3/91 (.22LR) Caliber Conversion Kit - LIKE NEW - HKP-22093 HK91, G3 Caliber Conversion Kit - .22LR
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    HK91, G3 Caliber Conversion Kit - .22LR

    H&K Heckler & Koch

    $1,895.95
    Heckler and Koch HK G3, HK91 .22LR Caliber Conversion Kit - LIKE NEW SOLD AS IS. NO RETURNS. Convert any HK91 or HK G3 rifle to cycle .22LR ammunition with this genuine HK caliber conversion kit...
    HKP-22093
    $1,895.95
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  • On Sale
    Used - AR-15 A2 Stock Sling Adapter - USED - HKP-99180
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    AR-15 A2 Stock Sling Adapter - USED

    Now: $9.97
    Was: $24.95
    AR-15 A2 Stock Sling Adapter - USED US-made stock sling adapter for the AR-15 A2 stock. Compatible With: AR-15 A2 Stock
    HKP-99180
    Now: $9.97
    Was: $24.95
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  • Out Of Stock
    New - H&K P7 PSP 9mm Slide - HKP-99168 HK P7 PSP 9mm Slide
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    HK P7 PSP 9mm Slide

    H&K Heckler & Koch

    $1,589.95
    H&K P7 PSP 9mm Slide Factory German slide for the HK P7 PSP chambered in 9mm. These slides have been out of production for a very long time but we discovered one last unit in our inventory.  The...
    HKP-99168
    $1,589.95
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  • On Sale
    New - H&K 417 E1 Bolt Head - Complete - HKP-22037 HK417, MR762 Bolt Head, Complete - E1
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    HK417, MR762 Bolt Head, Complete - E1

    H&K Heckler & Koch

    Now: $536.95
    Was: $595.95
    Heckler and Koch 417 E1 Bolt Head - Complete Rare factory bolt head for the HK417. Compatible With: HK MR762 HK417
    HKP-22037
    Now: $536.95
    Was: $595.95
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  • New - H&K MP7 Lock Washer - HKP-21978
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    HK MP7 Lock Washer

    H&K Heckler & Koch

    $4.95
    H&K MP7 Lock Washer Factory lock washer for the MP7 platform.  Specifications: Inside diameter: 4.10mm Outside diameter: 7.75mm<
    HKP-21978
    $4.95
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  • On Sale
    HK G3 A2 Adjustable Stock Extension - GUNSMITH SPECIAL HK G3 A2 Adjustable Stock Extension - GUNSMITH SPECIAL
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    HK G3 A2 Adjustable Stock Extension - GUNSMITH SPECIAL

    USA

    Now: $22.46
    Was: $69.95
    G3 A2 Adjustable Stock Extension -GUNSMITH SPECIAL MISSING EXTENSION BLOCKS Please Note: Will require work before being functional. HKP recommends the work be performed by a professional gunsmith...
    HKP-00872-B
    Now: $22.46
    Was: $69.95
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  • New - H&K 21/21E/23/23E Double Frame Front Sight Base - HKP-21908 HK21, HK21E, HK23, HK23E Double Frame Front Sight Base
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    HK21, HK21E, HK23, HK23E Double Frame Front Sight Base

    H&K Heckler & Koch

    $66.95
    H&K 21/21E/23/23E Double Frame Front Sight Base Original, unissued German double frame front sight bases. These have never been welded to a cocking tube and are perfect for completing or restoring...
    HKP-21908
    $66.95
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  • New - H&K 21E/23E Left Receiver Reinforcement Rail Weldment - HKP-21907 HK21E, HK23E Left Receiver Reinforcement Rail Weldment
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    HK21E, HK23E Left Receiver Reinforcement Rail Weldment

    H&K Heckler & Koch

    $14.95
    H&K 21E/23E Left Receiver Reinforcement Rail Weldment Genuine German-made weldment for left-side receiver reinforcement rail. Precision-machined using the correct steel and milling for you HK21E or...
    HKP-21907
    $14.95
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  • On Sale
    New - HKP HK MP5K 40/10 Brace/Stock Adapter - HKP-21869 HK MP5K Stock or Brace Adapter - .40 S&W, 10mm
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    HK MP5K Stock or Brace Adapter - .40 S&W, 10mm

    HKP HK Parts

    Now: $72.64
    Was: $113.95
    HKP HK Parts .40S&W and 10mm Brace and Stock Adapter for HK MP5K Easily attach your favorite A2 style stock to your MP5K 40, 10 with this durable, precision-engineered adapter. Made in the US and...
    HKP-21869
    Now: $72.64
    Was: $113.95
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    Was: $113.95
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