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 ACR Stock and Adapter
Magpul
$599.95HK MP5 Magpul ACR Stock with HKP Adapter: The HKP adapter and Magpul ACR stock combo is a complete, drop-in ready unit. Magpul discontinued production of the ACR stock and we have just a few units left. Grab yours while you...HKP-21370-M$599.95 -
On Sale
HK G36, HK33 Compensator - 15x1 RH - KeyMount (KeyMicro)
JMAC Customs
Now: $59.95Was: $99.95JMAC G36/HK33 (5.56/.223) Recoil Reduction Device - 2 Port Compensator 15-1 Threads - KeyMount (KeyMicro) Can be permanently attached to a 14.5" barrel to achieve 16" OAL. Compatible With: HK G36C (NOT compatible with first gen. HK G36C & Tommy...HKP-21254Now: $59.95Was: $99.95 -
HK416, MR5566 Sling Loop - Ambi
H&K Heckler & Koch
$154.95H&K HK MR556/416 Ambi Sling Loop Ambidextrous sling loop for a quick and easy carrying option. compatible with any sling that attaches via a sling hook. Intended for the HK 416 format but is compatible with any picatinny rail. Compatible With: HK...HKP-20341$154.95 -
On Sale
HK VP9 Stand Off Device
HKP HK Parts
Now: $87.95Was: $109.95HKP HK VP9 Stand Off Device The HK Parts VP9 standoff is designed to keep the slide in battery to allow discharge when the firearm is pressed against or comes into contact with an object. It is an excellent self-defense addition. The standoff device...HKP-19143Now: $87.95Was: $109.95 -
On Sale
HK P2000 Conversion Barrel - .40 S&W to .357 SIG
RCM
Now: $203.95Was: $239.95RCM HK P2000 .40 to .357 Conversion Barrel This is a great spare or replacement barrel to have on hand. Also, a popular barrel to convert the P2000 .40 to .357. Compatible With: HK P2000 .40 S&WHKP-20580Now: $203.95Was: $239.95 -
Out Of Stock
HK USP Conversion Barrel - .40 S&W to .357 SIG - Non-Threaded
RCM
$237.50RCM HK USP .40 S&W To .357 SIG Conversion Barrel - Non-Threaded Each barrel is finely and painstakingly made from ordnance grade steel, heat treated, with a nitrided finish inside and out. This is the finest replacement barrel available for the HK...HKP-17746$237.50 -
On Sale
HK Mark 23 Tactical Barrel - .45 ACP - 6.02" - Threaded .578x28 RH
RCM
Now: $245.95Was: $289.95RCM HK Mark 23 .45 ACP Tactical Barrel - Threaded .578x28 RH This HK Mark 23 tactical threaded barrel designed for compatibility with various flash hiders and sound suppressors. Unlike the factory HK Mark 23 barrel with 16x1 RH threads, this barrel...HKP-17444Now: $245.95Was: $289.95 -
HK USP, USP Compact .45 ACP New Style Extractor
H&K Heckler & Koch
$59.95New Style Extractor New HK German part with red loaded chamber indicator. Compatible with: USP 45, USP 45 Tactical USP Compact .45, USPC .45 Tactical USP ExpertHKP-01478$59.95 -
HK416, MR556, MR762 Fire Control Detent Stop Pin
H&K Heckler & Koch
$20.95H&K HK MR556/MR762/416 Fire Control Detent Stop Pin HK German manufacture. Compatible With: HK MR556 HK416 HK MR762HKP-15272$20.95 -
On Sale
HK SL8 to G36 Stock Block - Conversion - Pull Pin
HDPS
Now: $330.95Was: $389.95HDPS SL8 To G36 Stock Block This is the latest generation of a stock block with the pull pin, NOT the older style with the sling eyelets. The HDPS SL8 to G36 conversion stock block comes complete and includes a built-in buffer recoil rod, housing, steel...HKP-00807Now: $330.95Was: $389.95 -
Out Of Stock
HK UMP, USC Bolt Carrier - Semi Auto - .45 ACP - Complete
USA
$399.95USA HK UMP/USC .45 Semi Auto Bolt Carrier - Complete Replacement part for USC to UMP conversions. Marked .45 semi auto just like the OEM carrier. Includes: Extractor Firing Pin Firing Pin Spring Firing Pin Retaining Pin Compatible With: HK UMP ...HKP-18588$399.95 -
HK UMP, USC Factory Cleaning Kit - .45 ACP
HKP HK Parts / Heckler & Koch
$79.95Cleaning Kit For HK USC & UMP .45 ACP Subguns This Cleaning kit a genuine HK factory cleaning kit and is recommended by HK for all HK pistol owners. Includes: Saf-T-Clad cleaning rod Accessory adapter section #8-32 Patch holder Chamber face...HKP-01055$79.95