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.

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • New - AC-Unity HK G3 Pistol Grip - HKP-21629 HK MP5, HK91, G3 Pistol Grip
    Add to Cart

    HK MP5, HK91, G3 Pistol Grip

    AC-Unity

    $9.95
    AC-Unity HK G3 Pistol Grip Beautifully designed and textured for a great feel and sure grip. It also goes correct for HK33 or MP5 style weapons using buttstocks mounted with steel backplates. It is made from an advanced polymer-resin/granulate that is...
    $9.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $9.95
    Subtotal:
  • New - H&K GSG-5 Rear Sight - HKP-02401 HK GSG-5 Rear Sight
    Add to Cart

    HK GSG-5 Rear Sight

    H&K Heckler & Koch

    $18.95
    H&K GSG-5 Rear Sight This item will fit all GSG-5 models, including the PK and P models. This item is an all-steel HK-made part designed for combat and the toughest of environments. Each HK factory sight comes as shown and is...
    $18.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $18.95
    Subtotal:
  • New - Safariland Silicone Gun & Reel Cloth - HKP-17630 Safariland Silicone Gun & Reel Cloth Safariland HKP-17630
    Add to Cart

    Safariland Silicone Gun & Reel Cloth

    Safariland

    $3.95
    Safariland Silicone Gun & Reel Cloth Silicone gun cloth for all HK firearms to preserve and protect your firearms finish. Will also work for any firearm, magazine or part. A great way to protect your collectibles.
    $3.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $3.95
    Subtotal:
  • Out Of Stock
    New - F5 MFG 50 Round MP5/MP5K 9mm Drum Magazine - HKP-16537-M F5 MFG 50 Round MP5, MP5K 9mm Drum Magazine

    F5 MFG 50 Round MP5, MP5K 9mm Drum Magazine

    F5 MFG

    $199.00
    F5 MFG 50 Round MP5/MP5K 9mm Drum Magazine HK MP5 & MP5K 9mm - 50 Round Drum New 3rd generation redesigned version. Now offered at an even lower price! You asked for it and the long-awaited and highly anticipated MP5 50 Round Drum Magazine designed...
    $199.00
    Out Of Stock
    Qty in Cart: 0
    Quantity:
    Price:
    $199.00
    Subtotal:
  • New - HKP HK Piston Ring Replacement Set - 3 Ring Combo - HKP-17933
    Add to Cart

    HK416, MR556, G36, SL8 Piston Ring - Replacement Set of 3 - USA

    HKP HK Parts

    $8.95
    HK MR556, HK416 & G36, SL8 Gas Piston Ring Replacement Combo Set - 3 Rings This is a high wear common repair & replacement item. The gas rings are prone to periodic breakage & wear, tear and require them to be replaced periodically...
    $8.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $8.95
    Subtotal:
  • New - H&K 10 Round HK USP .40 S&W Magazine - Black - HKP-01205 HK USP Magazine  - .40 S&W - 10 Round
    Add to Cart

    HK USP Magazine - .40 S&W - 10 Round

    H&K Heckler & Koch

    $55.95
    HK German Full Size USP .40 10 Round Magazine Fits all USP full-size .40 pistols. Perfect for those who live in restricted states. Compatible With: HK USP .40 HK USP .40 Tactical HK USP Elite & Expert Please Note: This part will not fit the USP...
    $55.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $55.95
    Subtotal:
  • Out Of Stock
    New - HKP MP5 & MP5K 9mm Anti-Rattle Roller Tipped Paddle Magazine Release - HKP-17570 HK MP5, MP5K 9mm Anti-Rattle Roller Tipped Paddle Magazine Release

    HK MP5, MP5K 9mm Anti-Rattle Roller Tipped Paddle Magazine Release

    HKP HK Parts

    $29.47
    HK MP5, MP5K 9mm Anti-Rattle Roller Tipped Paddle Magazine Release Latest generation paddle mag release for all 9mm MP5, MP5K style builds. Made to the latest German specs, materials, and design.  Compatible With: MP5, 94 MP5K, SP89, SP5K Other...
    $29.47
    Out Of Stock
    Qty in Cart: 0
    Quantity:
    Price:
    $29.47
    Subtotal:
  • New - GSG 22 Round GSG-5/GSG-16 .22LR Magazine - Black - HKP-00794 GSG  22 Round GSG-5/GSG-16 .22LR Magazine
    Add to Cart

    GSG 22 Round GSG-5/GSG-16 .22LR Magazine

    GSG German Sports Guns

    $29.95
    GSG 22 Round GSG-5/GSG-16 .22LR Magazine The GSG magazine is a standard factory replacement magazine. The magazine is made from high-quality polymer and features a matte finish.  Compatible With: GSG-16 GSG5 GSG522 GSG5PK GSG-16PK  Please...
    $29.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $29.95
    Subtotal:
  • New - H&K 91/G3 (7.62x51/.308) Cocking Handle Support - HKP-01442 HK91, G3 Cocking Handle Support
    Add to Cart

    HK91, G3 Cocking Handle Support

    H&K Heckler & Koch

    $24.95
    New HK German 91, G3, & PTR Cocking Handle Support A genuine German Heckler & Koch all-steel part. Compatible With: HK91 HK G3 PTR-91 PTR-32 HK .308 Custom builds & clones
    $24.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $24.95
    Subtotal:
  • Out Of Stock
    New - B&T MP5K/SP89/SP5K 9mm Tri-Rail Handguard - HKP-16889 B&T MP5K/SP89/SP5K 9mm Tri-Rail Handguard

    B&T MP5K/SP89/SP5K 9mm Tri-Rail Handguard

    B&T Brugger & Thomet

    $265.00
    B&T MP5K/SP89/SP5K 9mm Tri-Rail Handguard B&T Tri-Rail handguard for HK MP5K platforms. Specifications: Color: Black Height max: 48.4 mm Length max: 86 mm Length of right rail: 82 mm Length of left rail: 64 mm Length of bottom rail: 82...
    $265.00
    Out Of Stock
    Qty in Cart: 0
    Quantity:
    Price:
    $265.00
    Subtotal:
  • New - HKP HK USP45/Mark 23 +10 Magazine Extension - HKP-21371-M HK USP45, Mark 23 +10 Magazine Extension
    Choose Options

    HK USP45, Mark 23 +10 Magazine Extension

    HKP HK Parts

    $69.95
    Magazine Extension - +10 - HK USP .45 & Mark 23 Easy to install. Simply add the mag extension to your existing mag body and follower. No gunsmithing needed. Made 100% in the USA out of aircraft-grade hard coat anodized aluminum with steel hardware...
    $69.95
    Choose Options
    Qty in Cart: 0
    Quantity:
    Price:
    $69.95
    Subtotal:
  • On Sale
    New - HKP Sig Sauer P320-XTEN Compensator - HKP-21190 Sig Sauer Compensator - P320-XTEN
    Add to Cart

    Sig Sauer Compensator - P320-XTEN

    HKP HK Parts

    Now: $129.95
    Was: $189.95
    HKP Sig Sauer P320 X-Ten Compensator Our P320 X-Ten compensator reduces recoil and muzzle flip. Each unit is 100% US-made and finished in durable black cerakote. Our X-Ten compensator features a Picatinny rail to mount lights/lasers. Available...
    Now: $129.95
    Was: $189.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $129.95
    Was: $189.95
    Subtotal:
  • Total: items /

Adding your products to cart