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 Mark 23, SOCOM Magazine Extension Kit - 24 Round
HKP HK Parts
Now: $24.95Was: $39.95Mark 23 .45 Cal - 24 Round Magazine Extension Kit The HK Parts manufactured Mark 23 mag extension allows the user to convert existing HK Mark 23 12 round magazine to an enhanced 24 round magazine capacity. Easy to install, each kit comes complete with...HKP-17556Now: $24.95Was: $39.95 -
HK P30SK Holster - Infidel Ultra Max
Comp-Tac
$94.95Comp-Tac HK P30SK Infidel Ultra Max Holster The Infidel Ultra Holster is an Inside the Waistband Kydex and leather hybrid holster designed for concealed carry. Created to be worn behind the hip at 4:00 or 5:00, this holster is a perfect easy on easy off...HKP-17518-M$94.95 -
HK P30L Conversion Barrel - .40 S&W To .357 SIG - Non-Threaded
RCM
$237.50RCM HK P30L .40 S&W To .357 SIG Conversion Barrel - Non-Threaded Each barrel is meticulously crafted from ordnance-grade steel, heat-treated, and finished with a durable nitride coating. This is the finest threaded barrel for the HK P30L .40...HKP-17568$237.50 -
HK P30, P30L, P30S Backstrap - Small
H&K Heckler & Koch
$29.95Heckler and Koch Small Black Backstrap for HK P30, P30L, P30S New HK German manufactured. Compatible With: P30 9mm and .40 cal P30L 9mm and .40 cal P30S 9mm and .40 calHKP-01571$29.95 -
Out Of Stock
HK P2000 Barrel - .357 SIG
H&K Heckler & Koch
$329.95HK P2000 .357 Barrel This is a great spare or replacement barrel to have on hand. This is a popular barrel to convert the P2000 .40 to .357.HKP-01419$329.95 -
Out Of Stock
HK USP 45 Barrel - .45 ACP - 4.41" - Full Size
H&K Heckler & Koch
$384.99HK USP .45 ACP Full Size Standard Length Barrel This part can be a replacement barrel for the USP Tactical if you do not want to have the threaded barrel installed. Easy drop-in installation. It can also be used to convert the USP Tactical .45 to a...HKP-01520$384.99 -
HK USP Night Sights - Green, Yellow
Meprolight
$107.99HK USP Full Size Fixed Night Sight Set Features: Unequaled Low Light Performance Brightest Night Sights Available Today Used by Military & Law Enforcement All Tru-Dot sights are covered by a 12 years usable illumination warranty to original...HKP-02578$107.99 -
HK MP7, G36 Firing Pin Bolt O-Ring
H&K Heckler & Koch
$9.95HK G36 & MP7 Firing Pin - Bolt O-Ring Compatible With: HK G36 HK MP7HKP-01858$9.95 -
HK MP5F, MP5 Compression Spring - Cocking Lever Support
H&K Heckler & Koch
$9.95H&K MP5F & MP5 40,10 Cocking Support Handle Spring One of these springs is required for use with the cocking handle/support assembly. You need the following - MP5 40 cocking tube support, MP5 40 cocking handle, and the cocking handle spring to...HKP-00426$9.95 -
HK MP5 Barrel - 9mm - 8.85" - 3 Lug
RCM
$149.95RCM HK MP5 9mm Barrel - Non-Threaded 3-Lug Made from Cold Hammer Forged (CHF) steel, each high-quality barrel is processed with a durable nitride finish, similar to the treatment used by Sig Sauer. Precision-milled to the latest specifications with...HKP-02040$149.95 -
Out Of Stock
HK -2 Roller For Bolt Head 7.98mm - Under-sized
H&K Heckler & Koch
$19.95H&K -2 Roller For Bolt Head 7.98mm - Under-sized The proper roller size is essential for proper head spacing and bolt gap. New HK German not surplus or used goods. German-made -2 roller. Please Note: The price listed is per roller. Order 2 (pair) for...HKP-00505$19.95 -
HK MP5, MP5K, AP5, AP5-P Rear Sight Drum
MKE
$32.95MKE AP5, AP5-P, HK MP5, MP5K Rear Sight Drum This rear sight drum is manufactured by MKE for AP5 and AP5-P firearms and fits MP5 and MP5K pattern rifles and pistols. It is commonly used as an upgrade for clones that ship with G3-style rear sight bases...HKP-22490$32.95