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
HK21, PSG1, MSG90 Extractor - Factory - 7.62x51 / .308, 5.56 / .223
H&K Heckler & Koch
$129.95HK21E, 11E, PSG1, MSG90 Factory German HK ExtractorHKP-00250$129.95 -
Out Of Stock
HK91, G3 20 Round Steel Magazine - Latest HK Production
H&K Heckler & Koch
$0.00HK 91, G3, PTR .308 20 Round All Steel Magazine - German HK HK .308 factory steel 20 round all steel magazine. Each magazine is the latest HK German manufactured. Compatible With: HK 91 HK G3 PTR-91, PTR PDW Vector 51, G3K, HK51, HK51K Century C308...HKP-00542$0.00 -
On Sale
Raddlock 91/G3 (7.62x51/.308) Magazine Sled
Raddlock
Now: $10.95Was: $12.95Magazine Block for HK G3,91, PTR .308 Rifles. The Raddlock magazine block converts a mag-fed rifle to a single-shot rifle as dictated by certain restrictive states. Once installed, the rifle will only be able to be loaded through the ejection port...HKP-02448Now: $10.95Was: $12.95 -
On Sale
HK51, PTR PDW Stock - AR15 Style
PTR
Now: $271.95Was: $339.95HK51, PTR PDW Magpul Stock - AR-15 Style AR15/M16 to HK 90 series stock adapter for the HK51 and PTR PDW. This is a perfect compliment for those that want to use the popular Magpul Moe stock. Each adapter includes the proprietary locking ring, Magpul MOE...HKP-15753Now: $271.95Was: $339.95 -
HK91, G3, PTR Magazine - 5 Round - Steel
H&K Heckler & Koch
$174.95New HK German 5 Round Factory G3 and HK91 .308 Steel Magazine Factory German steel magazine. This is an original German 5 round magazine from HK, not a modified assembly/cut-down magazine. These mags are long out of production and only a...HKP-00220$174.95 -
On Sale
HK51, HK53 Barrel Extension - Fluted - Urbach Style - Threaded 15x1 RH
HKP HK Parts
Now: $82.95Was: $149.95HKP HK 53/51 (5.56/.223) Urbach Style 8 inch Fluted Barrel Extension - Threaded 15x1 RH This 8" long fluted barrel extension is designed to extend the overall length of a 51 or 53 barrel to meet the 16" legal requirement. Ideal for those using an 8"...HKP-17638Now: $82.95Was: $149.95 -
Out Of Stock
HK33, HK93 Barrel - 5.56 / .223 - 16.1" - Threaded 15x1 RH
PTR
$163.95PTR HK 93/33 (5.56/.223) Barrel - Threaded 15x1 RH New US made Barrel by PTR for the HK93, HK33 style of firearms. Specifications: Made In The USA 922r Compliant Counts as 1 US Made Part Overall length 16.1" 4140 Ordnance Grade Steel Threaded 15x1...HKP-16458$163.95 -
On Sale
HK53 Cocking Tube - Left Hand
HKP HK Parts
Now: $79.95Was: $99.95HK53 Length Cocking Tube - For Left Handed Shooters New HK53, HK51 cocking tube made in the US. Made to the exact HK specifications as the factory HK53 German cocking tube. This is the only factory correct HK53 cocking tube available as HK Germany does...HKP-19028Now: $79.95Was: $99.95 -
Out Of Stock
HK MP5 Magazine Follower - .40 S&W, 10mm
H&K Heckler & Koch
$19.95H&K Heckler and Koch Magazine Follower HK MP5 40,10 A perfect replacement part for all HK MP5 40,10 magazines.HKP-01635$19.95 -
HK MP5 Trigger Housing - SEF Navy Style - .40 S&W, 10mm
H&K Heckler & Koch
$99.95 - $179.95H&K MP5 40/10 SEF Navy Style Trigger Housing A perfect upgrade for your HK MP5 40/10 build. This is the only SEF-style housing available for the MP5 40/10 family of firearms. Each housing is professionally clipped and pinned and set up for the...HKP-00445$99.95 - $179.95 -
On Sale
HK MP5 Barrel Extension and Faux Suppressor - 3 Lug - .40 S&W, 10mm
HKP HK Parts
Now: $55.95Was: $69.95HKP MP5 40/10 Fake Suppressor/Barrel Extension - 3-Lug This fake suppressor is used as a barrel extension to bring your H&K MP5 40/10 8.85" barrel to legal conforming standards of 16" so you do not have to register the weapon as an SBR. This fits...HKP-00889Now: $55.95Was: $69.95 -
HK MP5K, SP89, SP5K End Cap, Incomplete - 9mm
H&K Heckler & Koch
$54.95HK Factory German MP5K, SP-89, SP5K End Cap - Incomplete Each pistol end cap is OEM HK German MP5K, MP5K-N, SP5K, SP89 stripped end cap. Compatible With: MP5K SP89 SP5K MP5K-N MP5K-PDW MP5K clones or other custom buildsHKP-18208$54.95