Parts Kits

Parts Kits

Complete Your H&K Firearm with Parts Kits - MP5, G36, HK416, and More!

Explore our comprehensive selection of H&K parts kits for your firearm needs. Whether you're into MP5, G36, HK416, G3, UMP, HK417, MR556, or MR762, we have the perfect parts kits to complete your H&K firearm. Don't compromise on quality; choose the best for your weapon. Browse our selection now to find the ideal parts kits for your H&K firearm.

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  • HKP HK 416, Colt M4 .22 Match Trigger Upgrade Spring Kit

    HKP HK 416, Colt M4 .22 Match Trigger Upgrade Spring Kit

    HKP HK Parts

    $17.49
    HK 416 .22 & Colt M4 -  .22 Match Trigger Spring Kit - Set of 3 Enhanced SpringsThe HK Parts Match drop-in spring upgrade set will enhance your HK 416's trigger pull to an even smooth, crisp, and lighter pull that will promote better control, which...
    HKP-17340
    $17.49
    Qty in Cart: 0
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  • PTR HK 91/G3/51 (7.62x51 / .308) Flat With Weldment Set PTR HK 91/G3/51 (7.62x51 / .308) Flat With Weldment Set

    PTR HK 91/G3/51 (7.62x51 / .308) Flat With Weldment Set

    PTR

    $166.95
    HK91, G3, PTR, CETME Flat & Weldment Combo - PTRBrand New HK91/G3/PTR91 or CETME receiver flat with brand new US weldment set offered as a complete package. Made by PTR91 on original HK tooling using factory specifications and a properly stamped...
    HKP-02086
    $166.95
    Qty in Cart: 0
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  • HKP MP5/HK94 Complete Weldment Set For Receiver Flat

    HKP MP5/HK94 Complete Weldment Set For Receiver Flat

    HKP HK Parts

    $49.95
    The finest most correct weldment set for your HK MP5, 94 project available. Our weldment kit is the preferred weldment kit for your parts build. Each set includes all the parts you will need to finish your 9mm flat.Each Weldment Kit Contains: 1x Semi...
    HKP-01453
    $49.95
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  • LSC MP5 9mm Receiver Flat LSC MP5 9mm Receiver Flat

    LSC MP5 9mm Receiver Flat

    LSC

    $199.95
    MP5 Receiver Flat -LSCLSC HK MP5 receiver flat is the most in spec flat that has ever been available. The best option for your HK German parts kit build.This flat is considered by many to be most sought after HK flat available on the market and perfect...
    HKP-20555
    $199.95
    Qty in Cart: 0
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  • HKP SP5K 9mm Drop In Paddle Mag Release Upgrade Kit HKP SP5K 9mm Drop In Paddle Mag Release Upgrade Kit

    HKP SP5K 9mm Drop In Paddle Mag Release Upgrade Kit

    HKP HK Parts

    $74.95
      HK SP5K Anti-Rattle Roller Tipped "Paddle" Magazine Release Install Kit No modifications, no refinishing...complete drop-in kit included New USA made busing for a drop-in install kit for the HK SP5K. This kit will allow any end-user to quickly,...
    HKP-18192
    $74.95
    Qty in Cart: 0
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  • LSC/PTR Receiver Flat- MP5 9mm LSC/PTR Receiver Flat- MP5 9mm

    LSC/PTR Receiver Flat- MP5 9mm

    LSC

    $224.95
    MP5 Receiver Flat - PTR/LSCSeveral years ago PTR bought out LSC and now owns the tooling and dies for the LSC 9mm flats. These elusive flats have been hard to find and are now available for the first time here at HK Parts!New PTR 9mm Receiver Flat made...
    HKP-01431
    $224.95
    Qty in Cart: 0
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  • H&K G3 Parts Kit - PTR Barrel & Flat

    H&K G3 Parts Kit - PTR Barrel & Flat

    H&K Heckler & Koch

    $799.95
    HK German G3 .308/7.62 X 51mm Surplus Parts Kit, PTR Barrel, Flat HK German G3 .308/7.62 X 51mm Surplus Parts Kit, PTR Barrel, FlatFinally, after more than 4 years of searching the globe we have HK German Surplus G3 parts kits available to offer. Each...
    HKP-16579
    $799.95
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  • Out Of Stock
    HKP HK 91 Polymer To Metal Trigger Group Conversion Kit HKP HK 91 Polymer To Metal Trigger Group Conversion Kit

    HKP HK 91 Polymer To Metal Trigger Group Conversion Kit

    HKP HK Parts

    $199.95
    HK 91/PTR 91 Polymer To Metal Trigger Group Conversion Kit. This is everything you will need to convert the lower trigger group on your HK 91 from polymer to metal housing with contoured grip. Just use your existing trigger pack to complete the...
    HKP-17362
    $199.95
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  • PTR HK MP5 Flat Receiver w/ Weldment Set PTR HK MP5 Flat Receiver w/ Weldment Set

    PTR HK MP5 Flat Receiver w/ Weldment Set

    PTR

    $289.95
    MP5 9mm Receiver Flat With Complete Weldment & Rivet Set - PTR/LSC Several years ago PTR bought out LSC and now owns the tooling and dyes for the LSC 9mm flats. These elusive flats have been hard to find and are now available for the first time here...
    HKP-19509
    $289.95
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  • HKP HK 91/G3 (7.62x51 / .308) US Made Trigger Pack - 4 U.S. 922 Parts HKP HK 91/G3 (7.62x51 / .308) US Made Trigger Pack - 4 U.S. 922 Parts

    HKP HK 91/G3 (7.62x51 / .308) US Made Trigger Pack - 4 U.S. 922 Parts

    HKP HK Parts

    $249.95
    Semi Auto Trigger Pack G3, 91 & PTR Models - 4 US 922R PartsHK G3, 91 & PTR .308 Semi Auto Trigger Pack Complete. Works with all 7.62 & .308 HK style firearms. Each Trigger Group Incorporates The Following US Made Compliant Parts Completely...
    HKP-17949
    $249.95
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  • Out Of Stock
    FMP - G3 Parts Kit - With Mags FMP - G3 Parts Kit - With Mags

    FMP - G3 Parts Kit - With Mags

    HKP HK Parts

    $324.95
    HK Contract Portuguese FMP (Fábrica Militar de Portugal) G3 .308/7.62 X 51mm Surplus Parts Kit The G3 has been an iconic Battle rifle utilized all over the world and revered as one of the best that H&K has offered. You now have the opportunity...
    HKP-20865
    $324.95
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  • Kinetic Development Group HK USC Conversion to ACR Stock Upgrade - FDE Kinetic Development Group HK USC Conversion to ACR Stock Upgrade - FDE

    Kinetic Development Group HK USC Conversion to ACR Stock Upgrade - FDE

    $459.95
    HK USC-UMP ACR Stock Adapter & ACR Stock Combo - BrownA new product that allows you to add the widely popular Remington ACR folding, adjustable stock to your USC-UMP conversion. Each unit comes complete with the ACR stock, hinge pin, sling mount and...
    HKP-19845
    $459.95
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  • H&K Magazine Release Set H&K Magazine Release Set

    H&K Magazine Release Set

    H&K Heckler & Koch

    $184.95
    Complete magazine paddle mag release kit that includes both the paddle mag release & standard left to right mag release on your HK 9mm rifle or pistol build. All mag release parts are new HK German factory fresh latest production and the new F style...
    HKP-02402
    $184.95
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  • HKP MP5 SD 9mm Front End Kit

    HKP MP5 SD 9mm Front End Kit

    HKP HK Parts

    $1,199.95
    HK MP5 SD Front End Build Kit - ON SALE!HK MP5 SD Front End Build Kit. Each Kit Comes With Everything Need To Build An MP5 SD Front End With The Exception Of The Actual Suppressor.Each kit consists of all new HK Parts featuring the finest USA (HK PARTS)...
    HKP-02399
    $1,199.95
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  • On Sale
    FN-FNS .40 S&W Pistol Parts Kit FN-FNS .40 S&W Pistol Parts Kit

    FN-FNS .40 S&W Pistol Parts Kit

    FN

    Now: $344.95
    Was: $399.95
    FN FNS -40 Cal Pistol Parts Kit Kits comes complete less the lower receiver. Each kit was handpicked and comes in in the factory hard case as pictured.  Complete slide assembly with firing pin and extractor assemblies Recoil rod assembly Cold...
    HKP-19741
    Now: $344.95
    Was: $399.95
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  • Out Of Stock
    HKP HK G36C Barrel Front End Kit HKP HK G36C Barrel Front End Kit

    HKP HK G36C Barrel Front End Kit

    HKP HK Parts

    $889.95
    G36C Barrel Front End Barrel Kit - 223/556 New production HK G36C style barrel conversion kit and front end kit. Each kit will include the necessary parts to build a G38/SL8 variant into the G36KC barrel length variant as pictured. All you need is this...
    HKP-18228
    $889.95
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  • H&K HK G3/HK 91/PTR Parts Kit - PTR Barrel, Flat - Handpicked

    H&K HK G3/HK 91/PTR Parts Kit - PTR Barrel, Flat - Handpicked

    H&K Heckler & Koch

    $1,199.95
    G3, 91 Hand Picked Parts Kit - Barrel, Flat Handpicked stock set Handpicked housing, grip Handpicked magazine Handpicked end date coded bolt group New cocking tube included Full-Auto Bolt Group Please note: Each part in the G3 parts kit will vary in...
    HKP-20071
    $1,199.95
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  • Taiwanese T65 Retro Parts Kit Taiwanese T65 Retro Parts Kit

    Taiwanese T65 Retro Parts Kit

    $1,199.95
    Taiwan - T65 Gas Piston Rifle Parts Kit Limited one time offering first time ever offered here in the USA. This is an extremely rare offering and only a very limited number of kits are available. Each kit was used in Central & South America during...
    HKP-19676
    $1,199.95
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  • FMP HK G3 (7.62x51 / .308) Parts Kit (HK Contract) FMP HK G3 (7.62x51 / .308) Parts Kit (HK Contract)

    FMP HK G3 (7.62x51 / .308) Parts Kit (HK Contract)

    FMP

    $429.95
    HK Contract Portuguese FMP G3 .308/7.62 X 51mm Surplus Parts Kit Finally, after more than 4 years of searching the globe, we have HK FMP Surplus G3 parts kits available to offer. Each parts kit comes complete with all parts from a functional HK G3 full...
    HKP-17694
    $429.95
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    $429.95
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  • On Sale
    HKP MP5K/SP89/SP5K 9mm Receiver Flat HKP MP5K/SP89/SP5K 9mm Receiver Flat

    HKP MP5K/SP89/SP5K 9mm Receiver Flat

    HKP HK Parts

    Now: $139.95
    Was: $159.95
    HK U.S Made MP5K, SP5K, & SP89 Receiver Flat HK MP5K receiver flat (no FFL required) as these are flats and are not considered receivers until the flat is rolled. These are the latest generation flats that have all of the latest improvements. Just...
    HKP-00768
    Now: $139.95
    Was: $159.95
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    Now: $139.95
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  • H&K G3 (7.62x51 / .308) Parts Kit H&K G3 (7.62x51 / .308) Parts Kit

    H&K G3 (7.62x51 / .308) Parts Kit

    H&K Heckler & Koch

    $524.95
    HK German G3 .308/7.62 X 51mm Surplus Parts Kit Each parts kit comes with all parts from a functional HK G3 full auto rifle that was demilled into a parts kit except for the barrel and receiver. Each part of the parts kit will vary from fair to excellent...
    HKP-00827
    $524.95
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    $524.95
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  • HKP MP5-SD 9mm Pistol Build Kit With Flat, Top Rail & Weldment Set

    HKP MP5-SD 9mm Pistol Build Kit With Flat, Top Rail & Weldment Set

    HKP HK Parts

    $2,499.95
    MP5 SD 9mm parts kit complete with all the parts needed for an MP5 semi-auto pistol. Each kit comes with all 6 of the needed US made compliance parts to be legal as a pistol (N/A) rifle, or SBR build.This is the first time that these iconic kits have...
    HKP-18052
    $2,499.95
    Qty in Cart: 0
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  • HKP MP5K 9mm Complete Pistol Build Kit HKP MP5K 9mm Complete Pistol Build Kit

    HKP MP5K 9mm Complete Pistol Build Kit

    HKP HK Parts

    $2,099.95
    MP5K, MP5K-N Style Pistol Build Kit Complete - ON SALE WHILE SUPPLIES LAST! The finest USA & German made parts for a complete parts kit for an MP5K, MP5K-N pistol buildEach kit includes the following HK Parts: Barrel - 5.5" button rifled, 3-lugged...
    HKP-02604
    $2,099.95
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  • EBO HK G3 (7.62x51 / .308) Parts Kit - Tungsten Filled Carrier - (Greek HK Contract) EBO HK G3 (7.62x51 / .308) Parts Kit - Tungsten Filled Carrier - (Greek HK Contract)

    EBO HK G3 (7.62x51 / .308) Parts Kit - Tungsten Filled Carrier - (Greek HK Contract)

    EBO

    $499.95
    HK Contract Greek EBO G3 .308/7.62 X 51mm Surplus Parts Kit Rare and HK Greek EBO Surplus G3 parts kits with the Tungsten filled bolt carriers. Each de-milled parts kit comes with all parts from a functional HK G3 full auto rifle except the barrel and...
    HKP-17695
    $499.95
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  • H&K G3 Parts Kit - PTR Barrel H&K G3 Parts Kit - PTR Barrel

    H&K G3 Parts Kit - PTR Barrel

    H&K Heckler & Koch

    $699.95
    HK German G3 .308/7.62 X 51mm Surplus Parts KitFinally, after more than 4 years of searching the globe, we have HK German Surplus G3 parts kits available to offer. Each parts kit comes complete with all parts from a functional HK G3 full auto rifle that...
    HKP-16577
    $699.95
    Qty in Cart: 0
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    $699.95
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  • HKP HK 416C 9" Complete Upper Kit HKP HK 416C 9" Complete Upper Kit

    HKP HK 416C 9" Complete Upper Kit

    HKP HK Parts

    $2,799.95
    HK416C Complete Upper Kit - 9"  After years trying to get these back in. We finally bring you a rare unicorn of a find. With our complete 416c upper kit all that would be needed to complete this kit would be a mil-spec lower or a STS 416c lower...
    HKP-21042
    $2,799.95
    Qty in Cart: 0
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  • B&T APC9/APC45 Stock Conversion Kit B&T APC9/APC45 Stock Conversion Kit

    B&T APC9/APC45 Stock Conversion Kit

    $149.95
    Stock Conversion Kit - APC9/APC45 Converts the Telescopic Brace into a Telescopic Stock.   **B&T Stock Conversion Kit For BT-20522 Telescopic Brace (US Version) - For APC9/APC45
    HKP-19968
    $149.95
    Qty in Cart: 0
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    $149.95
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  • HKP MP5 9mm Pistol Build Kit With Flat, Top Rail & Weldment Set

    HKP MP5 9mm Pistol Build Kit With Flat, Top Rail & Weldment Set

    HKP HK Parts

    $2,099.95
    MP5 9mm Pistol Build Kit Complete German & USA Made PartsON SALE WHILE SUPPLIES LAST!MP5 9mm parts kit complete with all the parts needed for an MP5 semi-auto pistol. Each kit comes with all 6 of the needed US made compliance parts to be legal as a...
    HKP-18039
    $2,099.95
    Qty in Cart: 0
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    $2,099.95
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  • Out Of Stock
    Streamlight H&K USP Conversion Kit Streamlight H&K USP Conversion Kit

    Streamlight H&K USP Conversion Kit

    Streamlight

    $24.95
    TLR-3 & TLR-4/TLR-4G H&K USP Full Size Conversion Kit ? Full Size USP. This kit adapts a standard TLR-3 or TLR-4 to fit a USP full size pistol. 
    HKP-16923
    $24.95
    Qty in Cart: 0
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    $24.95
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  • H&K HK MR556 M-LOK 16.5" Forearm Upper Kit - Black H&K HK MR556 M-LOK 16.5" Forearm Upper Kit - Black

    H&K HK MR556 M-LOK 16.5" Forearm Upper Kit - Black

    H&K Heckler & Koch

    $1,779.95
    New HK Factory German MR556 Upper Kit with M-Lok forearm HK MR556 Upper kit includes: Complete MR556 upper receiver with M-Lok forearm MR556 Bolt group Complete Tungsten Filled HK Buffer HK Buffer Spring One 30 Round HK Steel Maritime Magazine No FFL...
    HKP-17366
    $1,779.95
    Qty in Cart: 0
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    $1,779.95
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  • GSG9 HK G36K AR Rifle Kit

    GSG9 HK G36K AR Rifle Kit

    GSG9

    $1,849.95
    Complete G36K AR Parts Kit with Folding Stock. Includes all parts needed for a complete build minus the receiver and magazine catch. This kit has a an AR15 1/2 X 28 threaded barrel and flash hider. This kit uses standard G36 magazines as well.*USA Made...
    HKP-19130
    $1,849.95
    Qty in Cart: 0
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    $1,849.95
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  • H&K, B&T HK MP5 Swiss & German Parts Kit With B&T Folding Pistol Brace

    H&K, B&T HK MP5 Swiss & German Parts Kit With B&T Folding Pistol Brace

    $2,399.95
    HK German MP5 made with Swiss Marked & Proofed HK MP5 Parts KitNever before offered or available anywhere or from any company. This is a one time offering only available here at HK Parts.Each HK MP5 parts kit includes the following: German demilled...
    HKP-19477
    $2,399.95
    Qty in Cart: 0
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    $2,399.95
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  • Streamlight HK USPC Conversion Kit Streamlight HK USPC Conversion Kit

    Streamlight HK USPC Conversion Kit

    Streamlight

    $23.95
    TLR-3 & TLR-4/TLR-4G H&K USP Compact Conversion Kit for all USP Compact models. For use with a standard TLR-3 & TLR-4
    HKP-16922
    $23.95
    Qty in Cart: 0
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    $23.95
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  • Out Of Stock
    FN P90 Demilled Parts Kit

    FN P90 Demilled Parts Kit

    FN

    $3,499.95
    Rare and hard to find. A factory FN P90 F/A parts kit comes as pictured with all pieces less the actual receiver included one 50 round magazine. ( Non FFL item as this is a parts kit)
    HKP-19639
    $3,499.95
    Qty in Cart: 0
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    $3,499.95
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