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 StockOn Sale
HK MP5, HK91, G3, HK93, HK94 2-Stage Trigger
Timney Triggers
Now: $249.95Was: $298.95Timney Trigger for MP-5, HK 91/93/94, G3, Clones The Timney HK MP5 trigger is factory-set with a two pound first stage and a two pound second stage pull weight. All trigger parts have been expertly designed and precision machined from premium materials...HKP-20500Now: $249.95Was: $298.95 -
HK33 Slimline Handguard
H&K Heckler & Koch
$59.95H&K HK HK33 Slimline Forearm Used German military surplus black cerakote slimline forearm cut down to fit the HK33. These are rare items only offered here at HK Parts. Each item is in good to excellent shape. Compatible With: HK33 HK...HKP-20273-M$59.95 -
On Sale
3-Lug Suppressor Adapter - 9mm - Threaded 5/8x24
Kaw Valley Precision
Now: $37.95Was: $44.99Kaw Valley Precision 9mm 3 Lug Suppressor Adapter - Threaded 5/8x24 The KVP 3-Lug adapters are manufactured to replicate the popular HK pattern 3-Lug interface. Concentricity of ID and OD surfaces are paramount in any suppressor attachment...HKP-19986Now: $37.95Was: $44.99 -
HK417, MR762, G28 Buffer Tube Castle Nut - Extended
H&K Heckler & Koch
$85.95Heckler and Koch Buffer Tube Castle Nut for HK G28, HK417 and HK MR762 New HK German G28 castle nut for the HK MR762, HK417, and G28 models. Black in color. This is the proper part for use with the G28 buffer tube and stock upgrades...HKP-16763$85.95 -
Out Of Stock
HK416, MR556 FFRS Retaining Spring
H&K Heckler & Koch
$9.99Heckler and Koch HK MR556/HK416 FFRS Retaining Spring The retainer spring retains the handguard locking pin on the Free Floating Rail System (FFRS). These can become damaged with the removal of the handguard screws. Once the spring is damaged, they have...HKP-02617$9.99 -
HK416, MR556 Storage Cap Pin for Pistol Grips
H&K Heckler & Koch
$4.95Heckler and Koch HK MR556/416 Battle Grip Storage Cap PinHKP-16861$4.95 -
On Sale
HK USC Faux Suppressor - .45 ACP
HDPS
Now: $152.95Was: $180.99HDPS HK USC Faux Suppressor - .45 ACP Second-generation HDPS faux sound suppressor for the HK USC. This latest-production model is an integral one-piece design milled from a solid billet of aircraft-grade aluminum, with no separate parts to loosen,...HKP-02369Now: $152.95Was: $180.99 -
HK91, G3, PTR TWO Magazines with Pouch - 20 Round
H&K Heckler & Koch
$49.952x20 Round Like New Aluminum Mags W/ New Cloth Mag Pouch - Flectarn Compatible With: HK 91 HK G3 HK PSG-1 HK MSG-90 PTR-91 Vector 51 Century HK 308 clones Other custom HK91/G3 style builds or custom clonesHKP-14550$49.95 -
HK MP5F, MP5 40,10 Factory Recoil Spring
H&K Heckler & Koch
$14.95HK German MP5 F 9mm & MP5 40/10 Recoil Spring - New Updated Version New latest HK German manufacture MP5 40/10 replacement recoil spring. Hard to find and a high wear and replacement item. Each spring replaces the MP5F recoil spring for the MP5 9mm...HKP-01061$14.95 -
On Sale
HK MP5, HK90 Series Trigger Spring - SEF, Navy
MKE
Now: $2.45Was: $8.95MKE SEF & Navy 3 Position Trigger Spring The MKE trigger spring is an essential upgrade for anyone dealing with worn or broken trigger return springs in surplus trigger packs or as spares for all 90 series owners. These springs are fully compatible...HKP-22225Now: $2.45Was: $8.95 -
On Sale
HK CC9 Holster - Comp Carry - RH
Comp-Tac
Now: $53.95Was: $59.95Comp-Tac HK CC9 Comp Carry Holster - Right Hand Designed for the HK CC9 with the HK Parts MOD 1 compensator, this holster offers a secure fit, smooth draw, and adjustable cant and ride height for optimal comfort and performance during concealed...HKP-22096Now: $53.95Was: $59.95 -
On Sale
HK G36, HK33 Flash Hider - KeyMount, KeyMicro - Threaded 15x1
JMAC Customs
Now: $87.98Was: $109.95JMAC HK G36/HK33 (5.56/.223) Flash Hider KeyMount (KeyMicro) - Threaded 15x1 In order to use this device with a suppressor it must be installed by a professional to ensure it is properly mounted and aligned. Do NOT shoot without checking alignment with...HKP-21255Now: $87.98Was: $109.95