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
HK MP5K Barrel - .40 S&W - Threaded 9/16x24 with 3 Lug
HKP HK Parts
Now: $199.95Was: $299.95HK MP5K .40 S&W 3-Lug Barrel with Thread Protector - Threaded 9/16x24 3-lugged Barrel with a 9/16x24 thread protector. Specifications: 3-lugged barrel Includes 9/16x24 thread protector Compatible With: HK MP5K .40 S&WHKP-02318Now: $199.95Was: $299.95 -
HK MP5 Trigger Pack SEF - Semi Auto - .40 S&W, 10mm
H&K Heckler & Koch
$269.95HK Parts and Heckler and Koch MP5 10mm and .40 S&W Semi-Auto SEF Complete Trigger Pack We have one of the best HK gunsmiths in the country who can take German HK F/A trigger packs and modify them to semi-auto. This is done with the best and most...HKP-00979$269.95 -
HK MP5K, SP89 Recoil Guide Rod - Stripped
H&K Heckler & Koch
$14.95New HK German MP5K, SP89 Recoil Guide Rod Bar Incomplete Recoil spring rod stripped. Compatible with all MP5K & SP89 recoil springs.HKP-01693$14.95 -
Out Of Stock
HK MP5K PDW Trigger Group, Complete - FBI - 9mm
H&K Heckler & Koch
$799.95HK Heckler and Koch 9mm Complete PDW FBI Trigger Group for HK MP5K This is a great upgrade and investment for your factory swing down MP5K or PDW (shown with an optional small push pin installed). New HK German with all the latest HK upgraded parts...HKP-02699$799.95 -
HK MP5 A3 Retractable Buttstock Release Lever
H&K Heckler & Koch
$19.95HK MP5 A3 Retractable Buttstock Release Lever For use with the newer Navy or F style A3 retractable MP5 stocks. Not for use on the older 1st generation metal levered MP5 stocks. This lever is much easier to break than the older style and a must have item...HKP-16404$19.95 -
HK MP5, HK91, G3, HK33, HK53, HK93 A3 Buttstock Locking Lever with Spring
H&K Heckler & Koch
$199.95HK MP5, HK91, G3, HK33/53/93 A3 Retractable Stock Locking Lever With Locking Spring Compatible With: MP5 (NOT compatible with MP5 .22 LR) HK G3, HK91 HK33, HK53, HK93HKP-02560$199.95 -
AR-15 Stock - ACS - Mil-Spec
Magpul
$93.95Magpul AR-15 ACS Stock - Mil-Spec The patent-pending Magpul ACS (Adaptable Carbine/Storage) mil-spec model is a drop-in replacement butt-stock for AR15/M16 carbines using mil-spec-sized receiver extension tubes. Similar to the Magpul CTR, the ACS also...HKP-01134$93.95 -
HK MP5 A3 Retractable Stock - Like New
H&K Heckler & Koch
$799.95Heckler and Koch MP5 A3 Retractable Stock Retractable A3 stock designed for the Heckler and Koch MP5 platform. In like-new condition. Compatible With: MP5, SP5 HK94 In-spec clones and custom buildsHKP-22784$799.95 -
HK MP5, SP5, MP5K Flash Hider - 9mm - A2 Style - 3-Lug
HKP HK Parts
$99.95A2 Style Flash Hider for MP5, MP5K Made from high-quality, durable materials, the HKP HK Parts Flash Hider guarantees long-lasting performance and corrosion resistance, making it an essential addition for both tactical operators and firearm...HKP-22706$99.95 -
HK MP5 A3 Retractable Buttstock Lever Rebuild Kit
H&K Heckler & Koch
$49.95Heckler and Koch Lever Rebuild Kit for A3 Retractable Buttstocks Rebuild kit for worn out or to complete A3 retractable stocks with metal back plate Compatible with: MP5 HK33 HK91, G3HKP-22547$49.95 -
On Sale
HK MP5 Magazine Body ONLY - 30 Round - GUNSMITH SPECIAL
MKE
Now: $24.95Was: $49.95HK MP5 Magazine Body ONLY - 30 Round - GUNSMITH SPECIAL VARYING CONDITION SHOWN - SOLD INDIVIDUALLY DENTED AND WARPED MAGAZING BODY COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART...HKP-21184-GSNow: $24.95Was: $49.95 -
HK USPC, HK45, HK45C Magazine Follower
HKP HK Parts
$5.95HKP HK Parts Magazine Follower for HK USPC, HK45, and HK45C A great U.S.-made spare to have on hand, as the follower is a wear-and-replacement part. Do not forget to order spare magazine springs while you are at it. Compatible With: USPC45 USPC45...HKP-22500-M$5.95