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 Trigger Group with With ESSL - Navy 3 Position 0,1,Full - 9mm
H&K Heckler & Koch
$2,549.95H&K Heckler and Koch 3 Position Navy Trigger Group 0, 1, Full with Extended Safety Selector Lever for HK MP5 New factory German complete trigger group with the left side extended lever. No longer available and just a few units remaining. Compatible...HKP-00159$2,549.95 -
HK MP5, HK94 Trigger Group - Ambi FBI 0,1 - Semi Auto - Clipped and Pinned
H&K Heckler & Koch
$799.95H&K Clipped & Pinned Semi-Auto FBI (0,1) Ambidextrous Trigger Group HK German factory Clipped & Pinned Semi-Auto FBI (0,1) Ambidextrous Trigger Group in 9mm For Your HK94 Or MP5 Conversion, this part updates your HK to the newer style...HKP-00154$799.95 -
HK MP5, AP5 Magazine Catch Push Button
MKE
$6.95HK MP5, AP5 Magazine Catch Button Push button for magazine catchCompatible with: HK MP5, SP5 HK MP5K, SP5K HK SP89 HK94 HK33, HK53, HK93 HK91, G3 In-spec. clones and custom buildsHKP-22548$6.95 -
On Sale
HK Linear Compensator - Threaded 15x1 RH - 5.56 and .308 - BLEMISHED
HKP HK Parts
Now: $89.95Was: $149.95HKP HK Linear Compensator - Threaded 15x1 RH - 5.56 and .308 - BLEMISHED COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. Linear compensators give you the best of...HKP-99398Now: $89.95Was: $149.95 -
HK CC9 Magazine +3 Extension Kit - 9mm
HKP HK Parts
$49.95HKP HK CC9 +3 Magazine Extension +3 magazine extension for the HK CC9. This low-profile base pad increases a standard 12-round CC9 magazine to 15 rounds. Machined in the U.S. from aircraft-grade hard coat anodized aluminum with steel hardware...HKP-22488-M$49.95 -
On Sale
HK91, G3, FMP Locking Piece - USED
H&K Heckler & Koch
Now: $8.93Was: $14.95Heckler and Koch Locking Piece for HK FMP HK91 and G3 - USED SOLD INDIVIDUALLY. USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. HK German Locking Piece for FMP - USED. This is the factory...HKP-16712-USEDNow: $8.93Was: $14.95 -
Out Of Stock
Compact Vertical Foregrip With Hand Stop - Picatinny
JMK
$98.95Compact Vertical Foregrip with Hand stop - Picatinny The JMK Vertical Foregrips are ideally suited for applications with restricted space. All grips are precision-machined from black walnut and complemented by a 6061 aircraft-grade aluminum handstop...HKP-22411-M$98.95 -
On Sale
Pistol Flash Hider - 9mm - 4 Prong - Threaded 1/2x28 - BLEMISHED
USA
Now: $53.95Was: $74.95HK (9mm) 4 Prong Pistol Flash Hider - Threaded 1/2x28 - BLEMISHED VARYING CONDITION SHOWN IN PHOTOS - SOLD INDIVIDUALLY COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE...HKP-01965-BNow: $53.95Was: $74.95 -
On Sale
HK MP5, AP5 SEF Trigger Pack Housing - Semi Auto
MKE
Now: $84.95Was: $124.95MKE HK MP5/AP5 SEF Trigger Pack Housing MKE trigger pack Housing for semi-auto SEF trigger housing. OEM part for Century AP5. Compatible With: HK MP5, MP5K with SEF housing Century Arms AP5, AP5-P with SEF housingHKP-22259Now: $84.95Was: $124.95 -
Out Of StockOn Sale
HK UMP 3 Position Lower Grip Frame - Black - RARE - USED
HKP HK Parts
Now: $449.95Was: $699.95HK UMP 3 Position Lower Grip Frame - Black - RARE - USED ONLY 1 UNIT AVAILABLE - AS PICTURED COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. Used UMP Lower...HKP-99274Now: $449.95Was: $699.95 -
Out Of Stock
HK CC9 Magazine Body - 9mm - 12 Round
H&K Heckler & Koch
$5.95Heckler and Koch 12-Round Magazine Body for HK CC9 OEM 10-round magazine body for the HK CC9, made in Germany by Heckler & Koch and ideal as a factory-spec replacement. Compatible With: CC9HKP-22147$5.95 -
HK CC9 Sear Spring
H&K Heckler & Koch
$6.95H&K CC9 Sear Spring Made in Germany, the CC9 sear spring applies tension to the sear for proper engagement and release during firing cycle. Compatible With: HK CC9HKP-22115$6.95