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
    New - H&K MP5-A2 .40 S&W German Parts Kit - HKP-00891
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    HK MP5 German Parts Kit - .40 S&W - A2 Stock

    HKP HK Parts

    Now: $3,581.95
    Was: $3,979.95
    HK MP5 40 S&W A German Parts Kit - Used Includes: Barrel - 3 lugs, threaded, and cold hammer-forged Trigger Group - Ambidextrous Navy 0,1, F Trigger Group A2 Fixed Stock Bolt Group Mp5 40 F/A Forearm - Standard wide black polymer Rear Sight...
    HKP-00891
    Now: $3,581.95
    Was: $3,979.95
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  • Out Of Stock
    New - H&K MP5K 40/10 3 Position Navy Style Housing - Clipped & Pinned - HKP-15454 HK MP5K Trigger Housing - 3 Position Navy Style - Clipped and Pinned - .40 S&W, 10mm

    HK MP5K Trigger Housing - 3 Position Navy Style - Clipped and Pinned - .40 S&W, 10mm

    H&K Heckler & Koch

    $0.00
    H&K MP5K 40/10 3 Position Navy Style Housing - Clipped & Pinned This lower housing is clipped and pinned for use on a semi-auto receiver shelves. For more information on our clipping and pinning, see our services section. We offer the best...
    HKP-15454
    $0.00
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  • On Sale
    New - H&K MP5 F Bolt Group Complete - HKP-00953
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    HK MP5F Bolt Group - Complete

    H&K Heckler & Koch

    Now: $2,448.95
    Was: $2,999.95
    H&K MP5 F Bolt Group Complete   The bolt head, bolt carrier, and all F/A-related parts have been restricted by HK and will become increasingly harder to find. The F in the MP5F designation was added after the French Military asked HK to "beef"...
    HKP-00953
    Now: $2,448.95
    Was: $2,999.95
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    Now: $2,448.95
    Was: $2,999.95
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  • On Sale
    New - B&T Tikka 412/512 Mount For Aimpoint - HKP-17432 B&T Tikka 412/512 Mount For Aimpoint B&T Brugger & Thomet HKP-17432
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    Tikka 412, 512 Optic Mount, Aimpoint

    B&T Brugger & Thomet

    Now: $99.95
    Was: $199.95
    B&T TikKa Valmet 412 Scope Mount Specifications: Color: Black Height max: 11 mm Length max: 157 mm Length of top rail: 157 mm Material: Aluminum NATO Accessory Rails: 1 Part number: BT-10178 Treatment: Hardcoat anodized Weight: 78 g Width max: 25 mm
    HKP-17432
    Now: $99.95
    Was: $199.95
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    Now: $99.95
    Was: $199.95
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  • Out Of Stock
    On Sale
    HK USP Magazine with Standard Floorplate - .45 ACP - 10 Round - USED HK USP Magazine with Standard Floorplate - .45 ACP - 10 Round - USED

    HK USP Magazine with Standard Floorplate - .45 ACP - 10 Round - USED

    H&K Heckler & Koch

    Now: $44.95
    Was: $54.95
    HK USP Magazine with Standard Floorplate - .45 ACP - 10 Round - USED USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL USED PART SALES ARE FINAL. Perfect for those who live in states that require 10-round magazines or those that...
    HKP-02366-USED
    Now: $44.95
    Was: $54.95
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    Now: $44.95
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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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    Now: $44.95
    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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    Now: $262.95
    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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    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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    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
    Out Of Stock
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    Now: $87.97
    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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    Now: $199.95
    Was: $269.95
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