HK Rifle / SMG Parts

HK Rifle / SMG Parts

Elevate Your HK Rifle with Premium Parts – MP5, HK416, SP5, and More!

Enhance your HK rifle with top-notch parts and accessories. From HK MP5 and HK MP5K to HK SP5 and HK UMP or HK USC, we offer a vast selection. Discover high-quality magazines, binary triggers, stocks, grips, barrels, handguards, sights, and more for your firearm. Whether you own an HK416, HK SP5K, HK G36, or HK MP5 22, we have the Heckler and Koch rifle parts you've been looking for. Shop now to upgrade your rifle to perfection.

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  • F5 HK MP5 ACR Stock - Picatinny Mount F5 MFG HKP-22350-M HK MP5, SP5 ACR Folding Stock with Stock or Brace Adapter - Picatinny
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    HK MP5, SP5 ACR Folding Stock with Stock or Brace Adapter - Picatinny

    F5 MFG

    $314.95
    F5 HK MP5/SP5 ACR Folding Stock w/Adapter - Picatinny The HKP picatinny end cap with the F5 ACR stock allows users to easily swap this, and other stocks, between their MP5 and other platforms.  This drop-in ready assembly attaches with the MP5's...
    HKP-22350-M
    $314.95
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    $314.95
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  • HK MP5 Trigger Group with AC-Unity Grip Conversion Kit HKP HK Parts HKP-22321 HK MP5 Trigger Group with AC-Unity Grip Conversion Kit HKP HK Parts HKP-22321
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    HK MP5 Metal Trigger Housing Conversion Kit - AC Unity Grip

    HKP HK Parts

    $189.95
    HK MP5 Metal Trigger Housing Conversion Kit - AC Unity Grip This kit includes everything you need to convert a polymer MP5 trigger group a robust metal housing. Simply use your existing semi-auto SEF trigger pack to complete the conversion. This...
    HKP-22321
    $189.95
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  • New - HK MP5 Magpul UCS Stock with Adapter - HKP-22197 HK MP5 UCS Stock and Adapter
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    HK MP5 UCS Stock and Adapter

    HKP HK Parts / Magpul

    $317.95
    HK MP5 Magpul UCS Stock with Adapter The HK Parts UCS adapter and stock for the MP5 pairs our proven stock adapter with Magpul's UCS stock for a compact, adjustable configuration. The UCS stock features a reversible hinge for left and right folding...
    HKP-22197
    $317.95
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  • Used - H&K 91/G3 (7.62x51/.308) A3 Retractable Stock - New Old Stock - HKP-22104 HK91, G3 A3 Retractable Buttstock - New Old Stock
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    HK91, G3 A3 Retractable Buttstock - New Old Stock

    H&K Heckler & Koch

    $1,345.95
    Heckler and Koch HK91, G3 A3 Retractable Stock - New Old Stock Genuine HK A3 retractable stock the HK91 or G3. These are original HK production units that have been out of manufacture for years, making remaining NOS increasingly rare. Compatible...
    HKP-22104
    $1,345.95
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  • New - H&K MR556/MR762 A4 Disconnector - HKP-21969
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    HK MR556, MR762 A4 Disconnector

    H&K Heckler & Koch

    $18.95
    H&K MR556/MR762 A4 Disconnector Factory H&K disconnector for use in MR556 A4 and MR762 A4 platforms.   Compatible With: HK MR556 A1/A4 HK MR762 A1/A4  
    HKP-21969
    $18.95
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  • On Sale
    New - HK 416 Bolt Hold Open Catch - HKP-99101 HK416 Catch - Bolt Hold Open
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    HK416 Catch - Bolt Hold Open

    USA

    Now: $19.95
    Was: $39.95
    HK 416 Bolt Hold Open Catch US-made bolt hold open catch for the HK 416. Compatible  With: HK 416 THIS CLOSEOUT PART IS NOT ELIGIBLE FOR RETURN, REFUND, OR EXCHANGE.  SALE IS FINAL.  
    HKP-99101
    Now: $19.95
    Was: $39.95
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  • New - Nefarious Arms HK MR556/416 11" A5 Barrel - HKP-21839 HK416 A5, MR556 A4 Barrel - 5.56 - 11" - Threaded 1/2"x28 - A5
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    HK416 A5, MR556 A4 Barrel - 5.56 - 11" - Threaded 1/2"x28 - A5

    Nefarious Arms

    $594.95
    Nefarious Arms HK MR556/HK416 11" A5 Barrel ***THE BARREL EXTENSION RIM IS MARKED "HAUS" DUE TO AN ERROR BY THE BARREL EXTENSION SUPPLIER.  THE MARKING IS NOT VISIBLE ONCE INSTALLED.  THESE BARRELS ARE GENUINE NEFARIOUS BARRELS AS NEFARIOUS...
    HKP-21839
    $594.95
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    $594.95
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  • New - HKP HK G36 Replacement 30 Round Magazine Spring - HKP-21830 HK G36 Magazine Spring - 30 Round
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    HK G36 Magazine Spring - 30 Round

    HKP HK Parts

    $7.95
    HKP HK G36 Replacement 30 Round Magazine Spring A high-quality replacement spring designed to restore optimal performance to your G36 magazine. Built to withstand frequent use, this component ensures smooth feeding and reliable function. Compatible...
    HKP-21830
    $7.95
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  • New - H&K HK53 Parts Kit - Like New - HKP-21780 HK53 Parts Kit - Like New
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    HK53 Parts Kit - Like New

    H&K Heckler & Koch

    $13,484.95
    H&K HK53 Parts Kit - Like New These HK53 kits are undoubtedly the most pristine kits we have ever come across.  Some of these kits were only test fired at the factory.  Each de-milled kit includes a factory new sling, like-new magazine,...
    HKP-21780
    $13,484.95
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  • Out Of Stock
    New - Michaels Machines HK21E/PSG1/MSG90 Extractor - HKP-21632 HK21E, HK23E, PSG1, PTR Extractor

    HK21E, HK23E, PSG1, PTR Extractor

    Michaels Machines

    $275.95
    Michaels Machines HK21E, HK23E, PSG1, MSG90 Extractor Replacement extractor for HK21E, HK23E, PSG1, and MSG90 bolt heads. Extractors are a known wear item on these platforms and are no longer produced by HK. The Michaels Machines extractor is a precise,...
    HKP-21632
    $275.95
    Out Of Stock
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  • HK G3K, HK33 Flash Hider - 4 Prong Enclosed
HK G3K, HK33 Flash Hider - 4 Prong Enclosed
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    HK G3K, HK33 Flash Hider - 4 Prong Enclosed

    RCM

    $187.95
    RCM HK G3K & HK33 Flash Hider - 4 Prong - Enclosed End The RCM G3K flash hider can be welded to a 12.69" barrel to achieve a non-SBR OAL of 16 plus inches or add to any other configuration. Made in the US from ordnance grade steel and counts as 1...
    HKP-21598
    $187.95
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  • New - B&T HK G36/G36K (5.56/.223) Mounting Rail - HKP-21461 HK G36, G36K Optic Mount - Dual Rail, Emergency Sight - NATO Accessory Rail
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    HK G36, G36K Optic Mount - Dual Rail, Emergency Sight - NATO Accessory Rail

    B&T Brugger & Thomet

    $397.95
    B&T HK G36/G36K (5.56/.223) Mounting Rail B&T NAR (Picatinny compatible) mounting rail for HK G36/G36K with emergency sight, dual rail. Compatible With: HK G36 HK G36K  
    HKP-21461
    $397.95
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    $397.95
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