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
R3D Night Sights - Orange
XS Sights
$112.95XS Sight Systems R3D Night Sights - Orange R3D Night Sights feature traditional 3-dot tritium, notch and post, sight picture. The tritium front sight comes equipped with our proprietary photoluminescent orange or green Glow Dot, which absorbs ambient...HKP-19935$112.95 -
Out Of StockOn Sale
HK416, MR556 Rail System - 13.75" - M-LOK, Picatinny
KDG Kinetic Development Group
Now: $259.95Was: $399.95Rail System - 13.75" - M-LOK - HK MR556 The New KDG HK 556 M-LOK rails are direct mount rail system, replacing the factory HK 556 rail systems. These new rails are identical in design to their big brother, the KDG HK 762 M-LOK Rail system. Like the 762...HKP-19244Now: $259.95Was: $399.95 -
HK SL8-1 Locking Lever - Complete
H&K Heckler & Koch
$39.95H&K HK SL8-1 Complete Locking Lever Heckler & Koch USC & SL8-1 Complete Locking Lever is a top-tier, factory original component crafted from robust black polymer. This German-made part is specifically engineered for the HK SL8, USC, and UMP...HKP-16375$39.95 -
Out Of Stock
B&T TP9 Barrel - 9mm - 130mm
B&T Brugger & Thomet
$449.95Swiss B&T manufactured 130mm TP9 9mm Barrel Assembly Factory B&T replacement barrel for the TP9. Made in Switzerland. Compatible With: B&T TP9HKP-17305$449.95 -
HK VP9SK Holster - The Defender IWB, OWB- LH
L.A.G. Tactical
$59.95L.A.G. Tactical HK VP9SK The Defender IWB/OWB LH Holster The Defender is known for being lightweight and comfortable. The easily interchangeable belt loops take you seamlessly from your outside the waistband range set up, to your highly concealable...HKP-18717$59.95 -
On Sale
HK VP40 Holster - MTAC
Comp-Tac
Now: $47.95Was: $94.95Comp-Tac HK VP40 MTAC Holster The MTAC is an inside the waistband Kydex and leather hybrid holster designed for concealed carry. Created to be worn behind the hip at 4:00 or 5:00, this holster offers the best in comfort and speed for concealed carry use...HKP-17466-MNow: $47.95Was: $94.95 -
HK MP5K, SP5K Slimline Handguard - OD Green - Refinished
H&K Heckler & Koch
$39.95Refinished HK MP5K Slimline Forearm - OD Green Refinished German military OD green slimline forearm with heat shield, modified to fit the MP5K. Available exclusively at HK Parts. Compatible With: MP5K, SP5KHKP-20498$39.95 -
HK P30SK Grip Wrap for Medium Backstraps - Rubber
Talon Grip
$19.99TALON Rubber Grip for HK P30SK Medium Backstrap Adhesive grip overlay designed for the HK P30SK pistol configured with the medium backstrap. This rubber-textured grip provides enhanced control and handling without adding significant bulk. The ultra-thin...HKP-20237$19.99 -
Out Of Stock
HK MP5 Brace System - Modular - .22LR - Havoc
F5 MFG
$349.95F5 MFG HK MP5 .22LR Modular Brace System Havoc MBS (Modular Brace System) for the MP5 .22LR. To convert your brace into a stock, simply swap out the brace attachment interface with F5's MSS stock interface in a matter of seconds (NFA rules apply)...HKP-20195$349.95 -
Tommy Built UMP Buffer Tube Adapter
$249.95Tommy Built UMP Buffer Tube Adapter UMP hinge with Buffer Tube Mount for adapting an AR style Mil spec brace or stock. Constructed of nylon and has 6 adjustable positions. Adapter only- stocks in the pictures are for reference.HKP-19967$249.95 -
On Sale
HK VP40 MatchWeight w/ Picatinny Rail
MatchWeight
Now: $89.98Was: $194.99Match Weight HK VP40 w/ Picatinny Rail The 2-piece compensator attaches with ease and only takes a few minutes to install. The compensator bolts onto your gun using two small screws, allen key included. A Match Weight Compensator adds both style and...HKP-19902Now: $89.98Was: $194.99 -
HK MP5, HK93, HK94 M4 Telescopic Stock
Choate
$246.99Choate M4 Telescopic Stock for MP5, HK93, and HK94 The M4 telescopic stock for the Heckler and Koch HK93, HK94 and MP5 replaces the existing stock and gives the shooter the ability to change the length of pull. The housing is all aluminum and...HKP-19895$246.99