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
    HK USP Magazine - 9mm - 10 Round - Standard Floorplate - USED HK USP Magazine - 9mm - 10 Round - Standard Floorplate - USED
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    HK USP Magazine - 9mm - 10 Round - Standard Floorplate - USED

    H&K Heckler & Koch

    Now: $44.95
    Was: $54.95
    HK USP Magazine - 9mm - 10 Round - Standard Floorplate - USED USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL USED PART SALES ARE FINAL. Factory 10-round magazine for the HK USP9, featuring a standard floorplate. Compatible With: HK...
    HKP-22415-USED
    Now: $44.95
    Was: $54.95
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    Was: $54.95
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  • On Sale
    HK91, G3 Trigger Pack - Semi-Auto - Ambi HK91, G3 Trigger Pack - Semi-Auto - Ambi
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    HK91, G3 Trigger Pack - Semi-Auto - Ambi

    HKP HK Parts / Heckler & Koch

    Now: $262.95
    Was: $349.95
    HKP Ambidextrous Semi-Auto Trigger Pack for HK91 and G3 - .308 HKP ambidextrous semi-auto trigger pack for HK91 and G3 pattern rifles in .308. Built from USA and German components, this steel trigger pack comes assembled and ready to install for...
    HKP-22855
    Now: $262.95
    Was: $349.95
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    Was: $349.95
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  • On Sale
    HK416, MR556 Buffer Spring - Enhanced - USED
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    HK416, MR556 Buffer Spring - Enhanced - USED

    H&K Heckler & Koch

    Now: $9.95
    Was: $23.95
    HK416, MR556 Buffer Spring - Enhanced - USED USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL USED PART SALES ARE FINAL. The HK MR556/416 buffer spring will also work with other AR-15 and M-16 rifles. It is a high-wear item and a...
    HKP-00039-USED
    Now: $9.95
    Was: $23.95
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  • Out Of Stock
    On Sale
    HK VP9, USPC, P Series Magazine Housing - 15 Round - GUNSMITH SPECIAL HK VP9, USPC, P Series Magazine Housing - 15 Round - GUNSMITH SPECIAL

    HK VP9, USPC, P Series Magazine Housing - 15 Round - GUNSMITH SPECIAL

    H&K Heckler & Koch

    Now: $35.95
    Was: $47.95
    HK VP9, USPC, P Series Magazine Housing - 15 Round - GUNSMITH SPECIAL BENT - DENTED Please Note: Will require work before being functional. HKP recommends the work be performed by a professional gunsmith. The Condition will vary from part-to-part vs...
    HKP-16655-B
    Now: $35.95
    Was: $47.95
    Out Of Stock
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    Now: $35.95
    Was: $47.95
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  • On Sale
    HK21, HK21E, HK11A1 Extractor Rebuild Kit - 21E and RCM 21-H Bolt Head HK21, HK21E, HK11A1 Extractor Rebuild Kit - 21E and RCM 21-H Bolt Head
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    HK21, HK21E, HK11A1 Extractor Rebuild Kit - 21E and RCM 21-H Bolt Head

    RCM

    Now: $67.95
    Was: $79.95
    RCM Extractor Rebuild Kit for HK21, HK21E, HK11A1 and RCM 21-H Bolt Heads Extractor rebuild kit for RCM HK21, HK21E, and HK11A1 21-H bolt heads. Made in the USA from steel, this kit is designed to refresh extractor-related wear components...
    HKP-22834
    Now: $67.95
    Was: $79.95
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  • Out Of Stock
    On Sale
    Sig MCX Carbine Handguard - Suppressor Compatible Sig MCX Carbine Handguard - Suppressor Compatible

    Sig MCX Carbine Handguard - Suppressor Compatible

    Sig Sauer

    Now: $87.97
    Was: $179.00
    SIG MCX Carbine Suppressor Compatible Handguard - KeyMod - Black SIG MCX carbine handguard built for suppressor-compatible setups. Constructed from aluminum, this discontinued KeyMod handguard offers a lightweight, factory-style option for carbine builds...
    HKP-99493
    Now: $87.97
    Was: $179.00
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    Was: $179.00
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  • On Sale
    HK UMP, USC Picatinny Rail Set - 4 Piece - Used HK UMP, USC Picatinny Rail Set - 4 Piece - Used
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    HK UMP, USC Picatinny Rail Set - 4 Piece - Used

    H&K Heckler & Koch

    Now: $199.95
    Was: $269.95
    Heckler and Koch 4 Piece Picatinny Rail Set for HK UMP and USC - Used Used HK factory Picatinny rail set for the HK UMP and USC. This 4 piece set includes one extended top rail for optics and three smaller rails for side and bottom mounting...
    HKP-99471
    Now: $199.95
    Was: $269.95
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  • HK416, MR556 Handguard - HKey - Euro Spec HK416, MR556 Handguard - HKey - Euro Spec
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    HK416, MR556 Handguard - HKey - Euro Spec

    H&K Heckler & Koch

    $576.95
    HK416, MR556 HKey Euro-Spec Slimline Handguard Euro-spec slimline handguard for HK416 and MR556 platforms. Compatible With: HK416, HK416 A1/A5 MR556, MR556 A1/A4 MR223 A3 In-spec clones and custom builds *NOT compatible with the US spec HKey accessories
    HKP-22837
    $576.95
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    Qty in Cart: 0
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  • HK VP9CC Elbow Spring For Trigger
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    HK VP9CC Elbow Spring For Trigger

    H&K Heckler & Koch

    $5.95
    HK VP9CC Elbow Spring For Trigger Elbow spring for the HK VP9CC pistol platform. Compatible With: VP9CC
    HKP-22746
    $5.95
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    Qty in Cart: 0
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    $5.95
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  • HK VP9CC Grooved Pin For Ejector
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    HK VP9CC Grooved Pin For Ejector

    H&K Heckler & Koch

    $5.95
    HK VP9CC Grooved Pin For Ejector Factory HK grooved pin for the ejector assembly in HK VP9CC pistol. Compatible With: VP9CC
    HKP-22754
    $5.95
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    $5.95
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  • HK VP9CC Sleeve, Rear
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    HK VP9CC Sleeve, Rear

    H&K Heckler & Koch

    $9.95
    HK VP9CC Sleeve Factory HK sleeve for the HK VP9CC pistol.  Compatible With: VP9CC
    HKP-22763
    $9.95
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    Qty in Cart: 0
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    $9.95
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  • HK VP9CC Pressure Spring For Slide Release
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    HK VP9CC Pressure Spring For Slide Release

    H&K Heckler & Koch

    $5.95
    HK VP9CC Spring for Slide Release Spring for the slide release for HK VP9CC pistol. Compatible With: VP9CC
    HKP-22747
    $5.95
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    Qty in Cart: 0
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    $5.95
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