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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HK45C, HK45CT Barrel - .45 ACP - 4.5" - Threaded 16x1 LH
H&K Heckler & Koch
$339.95Heckler and Koch HK45 Compact Tactical Barrel - Threaded 16x1 LH New HK German HK45C threaded tactical barrel. A drop in barrel for the HK45 compact firearm. Features: Heckler and Koch GenuinHKP-01036$339.95 -
HK MP5N Barrel - 9mm - 8.85" - Threaded 1/2x28 with 3 Lug
RCM
$165.00RCM HK MP5 9mm Navy Barrel - Threaded 1/2x28 - 3-Lug This MP5N barrel is made in the USA from Cold Hammer Forged steel, providing top quality and value. It is treated with a durable nitride finish,...HKP-01162$165.00 -
HK MP5A4, MP54A5, MP5SD Operators Red Book
H&K Heckler & Koch
$18.95New HK German MP5A4, MP5A5, & MP5SD Operators Red BookHKP-02227$18.95 -
HK MP5, HK33, HK53, HK93, G3 Housing - SEF Navy - Polymer - Clipped and Pinned
H&K Heckler & Koch
$179.95HK Heckler and Koch SEF Navy Polymer Housing Clipped and Pinned for 9mm, .308, and .223 HK MP5, HK33, HK53, HK93, HKG3 This navy style housing fits all shelved receivers. Specifications:HKP-00164$179.95 -
On Sale
HK MP5 Recoil Spring
MKE
Now: $5.96Was: $10.99MKE HK MP5 Recoil Spring Great replacement and spare recoil spring as this is a common repair and replacement item. Compatible With: HK MP5 CentHKP-22239Now: $5.96Was: $10.99 -
HK USP Thread Protector - .45 ACP - 16X1 LH
HKP HK Parts
$19.95HKP HK USP .45 ACP 16X1 LH Thread Protector Thread protector for 16X1 left-hand .45 ACP barrels. Compatible With: HK USP .45 & CompactHKP-22177$19.95 -
HK VP9, P30 Magazine - 30 Round - 9mm
HKP HK Parts
$119.9930 Round Magazine Complete - 9mm - HK PARTS - HK VP9, HK P30 Drop-in magazine ready to go! HK Parts takes an existing 15 round magazine and a +15 magazine extension to assemble them intoHKP-21304$119.99 -
On Sale
Sig P365 +3 Magazine Extension
Tactical Precision MFG
Now: $14.03Was: $44.95TPM Sig P365 +3 Magazine Extension This extension is made from machined 6061 Aluminum. This magazine extension will increase capacity, increase reload speed and mag drops, and overall functionality...HKP-21278-MNow: $14.03Was: $44.95 -
HK P30L Tactical Barrel - 9mm - 5.06" - Threaded 1/2x28 RH
RCM
$225.00RCM HK P30L 9mm Tactical Barrel - Threaded 1/2x28 RHHKP-20496$225.00 -
HK VP9L Barrel - 9mm - 5.6" - Threaded 13.5x1 LH
RCM
$262.50RCM HK VP9L 9mm Tactical Barrel - Threaded 13.5x1 LHHKP-19202$262.50 -
Maglula Gen 2 AR-15 5.56/.223 Mag Loader/Unloader
Maglula
$26.95Maglula Magazine Loader/Unloader - Generation 2, Lula, 223 Rem/556NATO, Fits AR-15 - Black The Maglula LULA magazine loader & unloader AR-15 for 223 Remington / 5.56mm NATO is a mil-spec tool that...HKP-14545$26.95 -
HK91, G3 Clubfoot Stock
HKP HK Parts
$299.95HK Clubfoot Stock HK clubfoot stock comes fully assembled with both US and German H&K parts. This stock assembly counts as one US-made part toward your 922r compliance. Compatible With:HKP-01920$299.95