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 - H&K UMP/USC (.40 S&W/.45 ACP/9mm) Recoil Buffer - HKP-00594
    Add to Cart

    HK UMP, USC Recoil Buffer - Heckler and Koch

    H&K Heckler & Koch

    $9.95
    HK German USC & UMP Recoil Buffer Replaceable spare lower housing or buffer for buffer housings. This is a high wear and replacement item and a must-have for spare parts. Compatible With: HK USC .45 HK UMP models
    HKP-00594
    $9.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $9.95
    Subtotal:
  • New - HK UMP/USC/SL8/G36 (.40 S&W/.45 ACP/9mm/5.56/.223) Front Sight Roll Pin - HKP-02158
    Add to Cart

    HK UMP, USC, SL8, G36 Front Sight Roll Pin

    H&K Heckler & Koch

    $5.95
    Heckler and Koch Front Sight Roll Pin for HK UMP, USC, G36, & SL8 Clamping sleeve or roll pin for calibers 9mm, .40 S&W, .45 ACP, 5.56 / .223 Compatible With: USC UMP G36 SL8  
    HKP-02158
    $5.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $5.95
    Subtotal:
  • New - H&K MR556/MR762 A4 Safety Lever - Right - HKP-21966 HK MR556, MR762 A4 Safety Lever - Right
    Add to Cart

    HK MR556, MR762 A4 Safety Lever - Right

    H&K Heckler & Koch

    $13.95
    H&K MR556/MR762 A4 Safety Lever - Right H&K factory right-side selector lever for MR-series ambidextrous safety systems.  Compatible With: HK MR762 A1/A4 HK MR556 A1/A4
    HKP-21966
    $13.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $13.95
    Subtotal:
  • On Sale
    New - Nefarious Arms - NAS HK 416 Adjustable Gas Block - HKP-21040 HK416, MR556 Adjustable Gas Block - 11-20" A1 Barrels - NA5
    Add to Cart

    HK416, MR556 Adjustable Gas Block - 11-20" A1 Barrels - NA5

    Nefarious Arms

    Now: $336.95
    Was: $374.95
    Nefarious Arms - NA5 HK 416 Adjustable Gas Block Nefarious Arm user configurable 2-position adjustable gas block compatible with 11″ – 20″ A1 MR556 and HK416 barrels.  Each gas block ships with 6 vent screws, a screwdriver,...
    HKP-21040
    Now: $336.95
    Was: $374.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $336.95
    Was: $374.95
    Subtotal:
  • On Sale
    New - RCM HK 53 Locking Piece #15 - 65 Degree - HKP-02524 HK53 Locking Piece #15 - 65 Degree
    Add to Cart

    HK53 Locking Piece #15 - 65 Degree

    RCM

    Now: $41.95
    Was: $49.95
    RCM HK 53 Locking Piece #15 - 65 Degree The #15 LP is the correct locking piece for the HK53 and several other custom-build applications. The locking piece is the timing mechanism that a delayed roller lock firearm uses to tell...
    HKP-02524
    Now: $41.95
    Was: $49.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $41.95
    Was: $49.95
    Subtotal:
  • Used - H&K 3 Point Green Sling-Used-Surplus - HKP-16273 H&K 3 Point Green Sling-Used-Surplus H&K Heckler & Koch HKP-16273
    Add to Cart

    HK 3 Point Green Sling-Used-Surplus

    H&K Heckler & Koch

    $55.00
    H&K 3 Point Green Sling-Used-Surplus German military surplus 3 point sling in good condition. Used but 100% operational and a great value for the money. 
    HKP-16273
    $55.00
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $55.00
    Subtotal:
  • On Sale
    New - Troy Industries HK 416/HK MR556/HK MR762/HK 417 Low Profile Micro Sights - HKP-01243 Troy Industries HK 416/HK MR556/HK MR762/HK 417 Low Profile Micro Sights Troy Industries HKP-01243
    Add to Cart

    HK416, MR556, HK417, MR762 Micro Sights - Low Profile

    Troy Industries

    Now: $179.95
    Was: $199.95
    Troy Industries Low Profile Micro Sights For those that need a lower profile sight for enhanced cheek weld position and eye relief, this is the sight set up for you. Each rear sight includes two different sight apertures, making the sight system modular...
    HKP-01243
    Now: $179.95
    Was: $199.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $179.95
    Was: $199.95
    Subtotal:
  • Out Of Stock
    New - H&K USP Detent Plate Variant 5, 6, 9 & 10 - HKP-01247 HK USP Detent Plate - V5, V6, V9, V10

    HK USP Detent Plate - V5, V6, V9, V10

    H&K Heckler & Koch

    $19.95
    HK Detent Plate For USP Variant 5, 6, 9, & 10 Conversions This plate, when installed, will allow you to have the "safety" only and NO decock function on your pistol. This plate will fit and work for both left-hand and right-hand setups. Compatible...
    HKP-01247
    $19.95
    Out Of Stock
    Qty in Cart: 0
    Quantity:
    Price:
    $19.95
    Subtotal:
  • On Sale
    New - GSG9 HK G36 Magwell - Black - HKP-18220 HK G36 Magwell - 10, 30, 100 Round
    Add to Cart

    HK G36 Magwell - 10, 30, 100 Round

    GSG9

    Now: $49.95
    Was: $58.95
    GSG9 HK G36 Magwell Allows use of all factory G36 & Magpul G36 magazines. Fits all 30 round, 10 round & 100 round magazines & drums. Made from high impact polymer. Compatible With: HK G36 HK G36K HK G36C Clones or other customer builds
    HKP-18220
    Now: $49.95
    Was: $58.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $49.95
    Was: $58.95
    Subtotal:
  • Used - H&K HK MP5 German 9mm Trigger Pack Complete F/A Roller Sear, XX Struted/Pinned Hammer - HKP-19342 HK MP5 Trigger Pack - 9mm - Complete - Full Auto - Hammer XX - Roller Sear
    Add to Cart

    HK MP5 Trigger Pack - 9mm - Complete - Full Auto - Hammer XX - Roller Sear

    H&K Heckler & Koch

    $499.95
    H&K MP5/K 9mm Full Auto Complete Trigger Pack This factory HK German MP5 9mm full auto trigger pack is offered as it was originally configured by HK Germany. It has been carefully preserved from a demilled 1980s production MP5 and comes complete with...
    HKP-19342
    $499.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $499.95
    Subtotal:
  • New - HK USP Full Size 9mm, .40 S&W Extractor - HKP-00324 HK USP Extractor - Full Size - 9mm, .40 S&W
    Add to Cart

    HK USP Extractor - Full Size - 9mm, .40 S&W

    H&K Heckler & Koch

    $54.95
    Heckler and Koch 9mm and .40 S&W Extractor for Full Size HK USP New HK German. A great spare and replacement item for your USP 9mm or USP .40 pistol. Compatible With: USP USP Tactical USP Expert USP Elite
    HKP-00324
    $54.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $54.95
    Subtotal:
  • New - H&K HK USP 9mm/40 S&W Recoil Spring - HKP-02067 HK USP 9mm, 40 S&W Recoil Spring
    Add to Cart

    HK USP 9mm, 40 S&W Recoil Spring

    H&K Heckler & Koch

    $9.95
    HK USP 9mm/40 S&W Recoil Spring It is the factory 12-12.5 lb. recoil spring. Fits the 9mm or .40 USP pistols and can also be used as a reduced-weight spring for the HK USP .45 pistol. A great replacement item that should be...
    HKP-02067
    $9.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $9.95
    Subtotal:
  • Total: items /

Adding your products to cart