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, 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 -
On Sale
HK MP5K, AP5-P End Cap - Incomplete - BLEMISHED
MKE
Now: $19.95Was: $27.95MKE MP5K, AP5-P Incomplete End Cap - BLEMISHED COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. MKE manufactured end cap for AP5-P and HK MP5K pattern firearms...HKP-99397Now: $19.95Was: $27.95 -
On Sale
HK90 Series Cocking Tube End Cap - Aluminum - USED
HKP HK Parts
Now: $7.95Was: $12.95HK Cocking Tube End Cap - Aluminum - USED USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL USED PART SALES ARE FINAL. Made from weight-saving aircraft-grade aluminum alloy. US-made. Compatible With: All 90 series HK firearms and...HKP-02806-USEDNow: $7.95Was: $12.95 -
HK MP5KSD Barrel - 9mm - 4.89″- Threaded 18x1
RCM
$174.95HK MP5KSD Barrel - 9mm - 4.89″- Threaded 18x1 The RCM HK Style MP5 SD-K Barrel measures 4.890 inches in length and is constructed from 41v50 cold hammer-forged steel. It features a salt bath nitride finish throughout. This barrel is designed based...HKP-22493$174.95 -
HK MP5K, AP5-P Housing - Contoured - 0, 1
MKE
$169.95 - $179.95MKE Contoured 0, 1 Housing for HK MP5K and MKE AP5-P This contoured 0, 1 (safe/fire) trigger housing is for HK MP5K-pattern firearms and is manufactured in Turkey. Compatible With: MP5K MKE AP5-P, AP5-M In-spec clones and custom buildsHKP-22468-M$169.95 - $179.95 -
WOOX Edge Stock - Walnut - Picatinny Mount
WOOX
$228.95 - $298.95WOOX Edge Stock - Walnut The WOOX Edge Stock is a premium upgrade for rifles and SMGs featuring a 3 Picatinny stock interface. It blends a precision-machined aluminum body with an American walnut cheek riser for a clean profile, solid lockup, and a...HKP-22460-M$228.95 - $298.95