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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On Sale
MP5SD Front Sight Tower
USA
Now: $41.95Was: $49.95MP5SD Front Sight Tower New US Made MP5SD Front Sight TowerHKP-15699Now: $41.95Was: $49.95 -
On Sale
HK416, MR556 C.A.R.L. - 2, 3, or 6 Round Interchangeable Cam Limiter
AS Designs
Now: $45.95Was: $55.00ST Inc Limiter Cam for HK416, MR556 ARC-Fire CARL Lever - 2, 3, and 6 Round Options Limiter cam for the ST Inc CARL lever used with the HK416 and MR556 ARC-Fire trigger setup. Available in 2, 3, and 6 round configurations, each cam changes the CARL reset...HKP-22565-MNow: $45.95Was: $55.00 -
HK91, G3 Magazine - 15 Round - Alloy
H&K Heckler & Koch
$44.95Heckler and Koch HK91, G3, MSG90 15-Round Alloy Magazine Manufactured by Heckler & Koch and converted to 15-round capacity in the United States using a U.S.-made floorplate. Counts as one U.S.-made part for 922r compliance. Compatible With: HK91,...HKP-22427$44.95 -
On Sale
HK MP5, MP5K Raised Optic Mount with Burris FastFire - 3.5 MOA
HKP HK Parts / Aimpoint
$458.95 - $509.95HK MP5 Burris FastFire 3.5 MOA Red Dot with Raised Optic Mount The HKP Raised optic mount was designed to elevate the sight to a height that is both comfortable and easy to view, while retaining an unobstructed view of the factory sights. Get the best...HKP-22398-M$458.95 - $509.95 -
HK MP5 Folding Stock or Brace - HDA3
Haga Defense
$349.95HDA3 Stock and Brace System for HK MP5, SP5 The HDA3 is a modular, USA-made stock and brace system developed by Haga Defense and A3 Industries. Built for strength, adaptability, and cross-platform compatibility, it delivers premium rigidity, smooth...HKP-22354-M$349.95 -
On Sale
HK MP5, MP5K Barrel Flute Cleaning Brush - .40 S&W, 10mm
HKP HK Parts
Now: $19.95Was: $24.95HKP HK Parts Cleaning Brush - Barrel Flute - 10mm / .40 S&W This is a must-have brush to keep the flute clean and the firearm running the way it should. Compatible With: MP5 10mm and .40 S&W MP5K 10mm and .40 S&WHKP-22318Now: $19.95Was: $24.95 -
HK MP5, HK90 Series Trigger Box - Full Auto SEF - USED
H&K Heckler & Koch
$89.95Heckler and Koch USED Full Auto SEF Trigger Box for the HK90 Series UNIT QUALITY MAY VARY - SEE PHOTOS FOR EXAMPLE OF CONDITION RANGE Used genuine HK full-auto trigger box for HK90 series firearms. Controls fire selector function and houses fire control...HKP-22156$89.95 -
HK CC9 Optic Cover Plate - Optic Ready
H&K Heckler & Koch
$51.95H&K CC9 Optic Ready Cover Plate German-manufactured cover plate for the optic cut on the H&K CC9 pistol. Installed when an optic is not mounted. Compatible With: HK CC9HKP-22141$51.95 -
HK CC9 Firing Pin Spring
H&K Heckler & Koch
$5.95H&K CC9 Firing Pin Spring Manufactured by H&K, this firing pin spring for the H&K CC9 pistol applies consistent tension to the firing pin, ensuring reliable ignition. Compatible With: HK CC9HKP-22138$5.95 -
HK USP Detent Plate - V1, V2
H&K Heckler & Koch
$13.95H&K USP V1/V2 Detent Plate Detent plate for full-size USP pistols. Used to convert or configure the pistol to Variant 1 (left-side safety/decocker) or Variant 2 (right-side safety/decocker). Ideal for users customizing their control layout...HKP-21982$13.95 -
On Sale
M-Lok Optic Mount - Offset Light
Magpul
Now: $32.95Was: $36.95Magpul M-Lok Offset Light / Optic Mount - Aluminum The M-LOK Offset Light/Optic Mount, Aluminum provides the user with an ambidextrous platform to mount weapons lights or optics at both the 11 and 1 o'clock positions on M-LOK compatible hand guards and...HKP-21875Now: $32.95Was: $36.95 -
HK21 FMP Complete Build Kit - Non Matching Numbers - 14.5" Barrel
FMP HK CONTRACT
$3,289.95HK21 Complete Build Kit- Non Matching Numbers - 14.5" Barrel HK Parts bring you yet another exhaustive parts kit. Our HK21 kit includes everything you need to resurrect an iconic classic and hit the range for some belt-fed action. Paired with...HKP-21848$3,289.95