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
HK USP Conversion Barrel - .40 S&W to 9mm - Threaded - 1/2x28
RCM
$214.95RCM HK USP .40 to 9mm Conversion Barrel - Threaded - 1/2x28HKP-21787$214.95 -
HK MP5 Adapter - Folding Stock
B&T Brugger & Thomet
$114.95B&T HK MP5 Adapter for Folding Stock Upgrade your MP5 platform with precision Swiss engineering. The Brügger & Thomet HK MP5 Adapter for Folding Stock provides a secure, reliable mounting interface...HKP-21751$114.95 -
Holosun 510 Series Open Reflex Sight - Picatinny Mount
Holosun
$354.95Holosun 510 Series Open Reflex Sight - Universal Picatinny Mount The HS510C is a versatile open reflex optic designed for long gun applications. HS510C is at home on carbines, PCCs, and shotguns due...HKP-21656-M$354.95 -
Out Of StockOn Sale
HK21 Drum Hanger
HKP HK Parts
Now: $164.95Was: $195.95HKP HK21 Drum Hanger Our HK21 drum hanger is precisley machined from 4140 billet steel, heat-treated to 50 Rockwell, and parkerized for a durable finish. A lower cost alternative to the discontinued...HKP-21453Now: $164.95Was: $195.95 -
On Sale
HK P30 Railok™ Threaded Barrel Compensator
HKP HK Parts
Now: $97.46Was: $189.95HK Parts Railok™ Mounting System Compensator for Threaded Barrel: H&K P30 The HK Parts Railok™ mounting system compensator strikes a seamless balance of form and function. Users will immediately...HKP-21225Now: $97.46Was: $189.95 -
On Sale
Sig P320 +3 Magazine Extension
Tactical Precision MFG
Now: $14.96Was: $44.95TPM Sig P320 +3 Magazine Extension This extension is made from machined 6061 aluminum. This magazine extension will increase the capacity, reload speed, mag drops, and overall functionality of your...HKP-21133-MNow: $14.96Was: $44.95 -
B&T Folding Stock/Length Adjustable Helmet Stock Section - Used
B&T Brugger & Thomet
$49.95B&T HK MP5K, SP5K, SP89 Folding/Adjustable Helmet Stock Section Used stocks taken from demilled Swiss Police MP5's. A great stock and value at a great price. Swiss made B&T folding and length...HKP-19784$49.95 -
Out Of Stock
Picatinny Rail Cover - 45mm
H&K Heckler & Koch
$14.95H&K 45mm Picatinny Rail Cover - Universal New factory HK rubberized picatinny rail cover. Specifications: Rail cover dimensions: 45x26x7 mmHKP-18857$14.95 -
HK VP40 Left Side Charging Support
H&K Heckler & Koch
$4.95H&K HK VP40 Left Side Charging Support - Black Compatible With: HK VP40 NOT for the VP9HKP-17684$4.95 -
HK91 SBA4 Pistol Stabilizing Brace and Adapter
SB Tactical
$319.95SB Tactical HK91 SBA4 Pistol Stabilizing Brace & Adapter Includes: G3, HK91 backplate & recoil assembly AR, M4 stock adapterHKP-19931$319.95 -
HK MP5 Handguard With LED Weapon Light - Used
B&T Brugger & Thomet
$399.95B&T HK MP5 Handguard With LED Weapon Light - Used B&T model TL99CREE LED lit handguard for HK MP5, 94 models. Each unit handguard is built with the integrated tactical LED light & 3 position switch.HKP-19605$399.95 -
HK416, MR556, HK417, MR762 Handguard Locking Screw
H&K Heckler & Koch
$16.95HK416, MR556, HK417, MR762 - Handguard Locking Screw Replacement handguard locking screw that secures the handguard to the upper receiver. Compatible With: HK HK416HKP-16601$16.95