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 MP5 Rear Sight Set - Dented
H&K Heckler & Koch
$49.99Rear Sight with Hardware - Used Dented - MP5 German HK MP5 rear sight assembly with a dented 4 position drum. Condition will vary. Includes: HK rear sight Detent Spring windage screw Sight screw Washer Locking washer Compatible With: MP5 MAC-5 clones...HKP-19247$49.99 -
HK Mark 23 Extractor Spring
H&K Heckler & Koch
$9.95Extractor Spring For HK Mark 23 Or SOCOM Pistol New HK German factory nickel-plated extractor spring. A great spare to have on hand and one of the highest wear and replacement parts on the Mark 23. Compatible with all models and years of the Mark 23...HKP-01430$9.95 -
Out Of Stock
HK USPC, USPC Tactical Conversion Barrel - .40 S&W to .357 SIG - Non-Threaded
RCM
$237.50RCM HK USPC .40 S&W to .357 SIG Caliber Conversion Barrel - Non-Threaded Each barrel is meticulously crafted from ordnance-grade steel, heat-treated, and finished with a durable nitride coating. This is the finest replacement barrel for the HK USPC ...HKP-17747$237.50 -
Dummy Rounds - .45 ACP - Set of 5
Strike Industries
$8.95Set of 5 .45 ACP Dummy Rounds Strike Industries dummy rounds will let you safely test the feeding, extraction, and magazine function of your firearms without the worry of accidental discharge. They also let you dry fire without risking damage to the...HKP-17384$8.95 -
HK UMP, USC Magazine Release Spring
H&K Heckler & Koch
$9.95HK UMP & USC Magazine Release Spring HK German factory mag release spring for all USC and UMP mag releases. Compatible With: USC lowers UMP lowersHKP-01899$9.95 -
HK91, G3 Tactical Handguard
PTR
$149.95New 2nd Generation- HK Black Matte Finish PTR, HK91, G3 Forearm Made from aircraft-grade aluminum, rock-solid, and lightweight. This forearm allows you to add up to 3 rails on your firearm. That includes the left, right, as well as bottom sides,...HKP-00368$149.95 -
HK91, G3 Folding Stock
Choate
$147.95HK91, G3, & PTR - Folding Stock The HK Choate side folding stock is complete with a sling swivel and a new German HK backplate, ready to drop on your favorite HK rifle. No gunsmith is needed as this is an easy-to-do drop in stock. Pull the two stock...HKP-01950$147.95 -
DTAC MP5K/SP89/SP5K 9mm Modular Handguard - M-LOK
DTAC Dakota Tactical
$159.95DTAC MP5K/SP89/SP5K 9mm Modular Handguard - M-LOK Features: Made in the USA (922r compliant part) M-LOK accessory compatible 6 ergonomically placed slots for maximum versatility Exclusive extended forward accessory mounting 1-piece main body machined...HKP-17808$159.95 -
HK MP5K Retractable Stock - SEF - 5-Position - PDWC
HKP HK Parts
$499.95HKP MP5K 9mm 5 Position Telscopic Stock - PDWC The stock rails collapse along the top ridge of the grip frame for the lowest profile stock ever produced for the MP5 family of firearms. Made in the USA. Includes: 5-position stainless steel nitrided...HKP-17825$499.95 -
HK91, G3 Tactical Rail - 4"
HKP HK Parts
$12.95HKP Tactical Rail - 4 Inch The six mounting screws are also included with each rail. This rail will fit on either the left or right side or the bottom of the PTR and HK91/93 tactical handguards. Up to three rails can be used on each forearm. Compatible...HKP-02528$12.95 -
HK MP5, MP5K Selector Lever, Left Side - Navy Trigger Groups
H&K Heckler & Koch
$399.95H&K Standard 4 Position Burst Left Side Selector Lever Compatible with any of the 0, 1, 3, F or 0, 1, 2, F trigger packs. Brand new HK German part. No longer available so get them while you can.HKP-00123$399.95 -
HK CC9 Grip Frame
H&K Heckler & Koch
$29.99Heckler and Koch CC9 Grip Frame Factory HK CC9 grip frame. Made from high-strength polymer with molded texturing for durability and enhanced control. Compatible With: HK CC9HKP-22206$29.99