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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Out Of Stock
HK VP9, VP40 Recoil Spring - Complete
H&K Heckler & Koch
$89.95H&K HK VP9, HK VP40 Complete Recoil Spring Assembly Newer style recoil spring offering that is now standard in all VP9 & VP40 models. This model has a slightly stiffer spring rate than the earlier 1st gen VP9 recoil spring models...HKP-17613$89.95 -
HK33, HK93, HK91, G3 Grips for Metal Frames - Plastic
EBO
$24.95Black Plastic Grips For Metal Grip Frames New Factory HK Contract metal grip. It is no longer in production and hard to find. Compatible With: HKG3 HK91 HK93 HK33HKP-00526$24.95 -
HK MP5, MP5K PDW Rear Sight Drum
H&K Heckler & Koch
$53.95MP5 Rear Sight Drum- German This item is the factory-correct rear sight drum for the MP5K PDW or MP5K-N family of firearms. This item is also a popular upgrade for many of the existing clones on the market, as many use factory-incorrect G3 rear sight...HKP-00072$53.95 -
On Sale
HK UMP Parts Kit - .45 ACP
HKP HK Parts
Now: $1,099.95Was: $1,299.95H&K UMP Parts Kit - .45 ACP The HK Parts UMP parts kit includes everything needed to build out an iconic HK UMP from a stripped receiver. Guaranteed to be the most cost-effective way to get your hands on a complete UMP when paired up with the...HKP-21433Now: $1,099.95Was: $1,299.95 -
HK G36, SL8 Handguard Rail - Bottom - 6"
HKP HK Parts
$27.95G36 & HK SL8 6" Bottom Rail Fits the SL8 and G36 full-size forearms. This item is just over 6" in overall length and is made from aircraft-grade aluminum. Comes with the screws needed for installation. From the center of the screw holes, there are...HKP-00285$27.95 -
UZI Lower with Grip Complete
IMI
$99.95Uzi Lower Complete - IMI Manufactured For The German Military Surplus IMI Manufactured Uzi Grip (lower) complete with all internals as shown. Each lower comes complete with all internals, grips and mag release assembly installed. Perfect for spare parts...HKP-16683$99.95 -
HK MP5, MP5K Magazine Release - 4-Piece Set
HKP HK Parts
$79.95HKP HK MP5/MP5K 4-Piece Set Magazine Release Each magazine catch set consists of 4 pieces and is a mixture of German HK and US-made parts. This is the set that provides left-to-right mag release controls. Each Set Includes: Mag catch (German) Push...HKP-00912$79.95 -
HKP Front Sight Blade
HKP HK Parts
$3.95HKP Front Sight Blade New US manufactured HK front sight blade. New US made. Compatible With: All HK front sight towers/triple frames.HKP-17551$3.95 -
HK MP5 Magazine Spring - 30 Round - Enhanced
HKP HK Parts
$8.95HKP HK MP5 30 Round Enhanced Magazine Spring US-made enhanced 30-round magazine spring for the MP5. Provides improved feeding reliability and consistent spring tension. Compatible With: HK MP5/KHKP-22157$8.95 -
HK MP5SD Barrel Port Cleaning Brush
HKP HK Parts
$69.95HKP HK MP5SD 9mm Barrel Port Brush The HKP MP5SD barrel port brush can be rotated in either direction for stiffer or softer cleaning when using our proprietary handle. Compatible with any brush handle featuring the factory thread pitch. Compatible...HKP-20989$69.95 -
HK Locking Washer - Rear Sights
HKP HK Parts
$2.95HKP Rear Sights Locking Washer HK German rear sights toothed locking washer used in perfect working order.HKP-00869$2.95 -
HK416, MR556, MR762 Trigger Guard Pin
H&K Heckler & Koch
$9.95HK MR556 & HK 416 Trigger Guard Retaining Pin Compatible With: HK 416 HK MR556HKP-02678$9.95