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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HK USP Series Firing Pin Block Spring - Old Style
H&K Heckler & Koch
$9.95HK USP Series Old Style Firing Pin Block Spring In order to use the new firing pin block spring, you also have to upgrade the firing pin, firing pin block, as well as the firing pin block spring. HK...HKP-02149$9.95 -
HK416, MR556, HK417, MR762 Forward Assist Plunger Spring
H&K Heckler & Koch
$5.95Heckler and Koch's Forward Assist Plunger Spring for HK416, MR556, HK417, MR762 New HK German manufacture. Compatible With: HK416, MR556 HK417, MR762HKP-02537$5.95 -
HK MP5 Magazine Follower - .40 S&W, 10mm - USA
HKP HK Parts
$9.95HKP MP5 40/10 Magazine Follower A perfect replacement part for all HK MP5 40/10 magazines. Also counts as one 922r compliant part.HKP-16506$9.95 -
HK CC9 Optic Plate Screw
H&K Heckler & Koch
$5.95H&K CC9 Optic Plate Screw German-made optic plate screw for the CC9 pistol. Two screws required to secure each optic plate. CompatiblHKP-22142$5.95 -
HK MP5, MP5K, SP5, SP5K Magazine Loader
B&T Brugger & Thomet
$24.00B&T Brugger and Thomet Magazine Loader for HK MP5, MP5K and HK SP5, HK SP5K The world’s fastest magazine loader. The B&T magazine loader loads your MP5 magazines directly from the ammo box tray into...HKP-21687$24.00 -
HK45, HK45 Compact Trigger Rebound Spring
H&K Heckler & Koch
$8.95HK45 Trigger Rebound Spring This part is also known as the trigger return spring. Compatible With: HK45 HK TacticalHKP-01812$8.95 -
HK416, MR556, HK417, MR762 Front Folding Sight - 33mm
H&K Heckler & Koch
$179.99Heckler and Koch's 33mm Front Folding Sight for HK416, MR556, HK417, MR762 HK416 Or HK MR556 Front Folding Sight. This item attaches directly to the front gas block of the HK 416, HK MR556 or HK...HKP-02548$179.99 -
HK UMP Magazine - 30 Round - 9mm
H&K Heckler & Koch
$62.95HK Heckler and Koch German 9mm 30 Round Factory Magazine for HK UMP The latest HK German production 30-round magazine is new and hard to find. Compatible With: UMP 9mmHKP-00608$62.95 -
Out Of Stock
HK SP5K 9mm Drop In Paddle Mag Release Upgrade Kit
H&K Heckler & Koch
$129.95HKP HK Parts and Heckler and Koch Anti-Rattle Roller Tipped Paddle Magazine Release Kit No modifications, no refinishing...complete drop-in kit included New HK German and USA made paddle mag...HKP-18082$129.95 -
On Sale
HK MP5 Recoil Spring
MKE
Now: $5.96Was: $10.99MKE HK MP5 Recoil Spring Great replacement and spare recoil spring as this is a common repair and replacement item. Compatible With: HK MP5 CentHKP-22239Now: $5.96Was: $10.99 -
On Sale
HK MP5, SP5, MP5K, SP5K Magazine - 30 Round - 9mm - Bundle of 10
Zenith
Now: $279.96Was: $349.9530 Round Magazine - Zenith - MP5, MP5K - Bundle of 10 Features: Durable electro-plated black finish for exceptional corrosion resistance All steel constructionHKP-20673Now: $279.96Was: $349.95 -
On Sale
HK SL8, G36 Magazine Release Axle Pin
GSG9
Now: $8.76Was: $10.95GSG9 Magazine Release Axle - USA made for HK G36 and HK SL8 Mag release axle for all G36 and SL8 models. A must-have spare part. Made in the USA. Compatible With: G36<HKP-18255Now: $8.76Was: $10.95