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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Locking Piece - 300 BLK
RCM
$49.95RCM 300 BLK Locking Piece New US manufactured 300 BLK locking piece for custom 300 builds or other custom 300 BLK HK style roller locked firearms. Compatible With: HK 93 & 33HKP-15547$49.95 -
HK MP5K, SP89, SP5K Stock or Brace Adapter - AR - QD Sling Attachment - 9mm
HKP HK Parts
$114.95HKP MP5K/SP89/SP5K 9mm AR Brace/Stock Adapter - QD Sling Attachment Each AR stock, brace adapter is made from a solid billet of CNC machined aircraft grade aluminum with QD Sling Attachment Points. Properly buffered with factory correct "H" buffers to...HKP-18796$114.95 -
HK MP5, MP5K, HK93, HK91 Handguard Retainer Screw - Tactical, Keymod, and M-LOK
PTR
$4.95PTR Tactical, Keymod & M-LOK, Retainer Handguard Screw This is the screw that is used on all the Tactical, Keymod, and M-LOK forearms (MP5K, MP5, HK93, HK91). A great spare to have in case the original screw gets lost.HKP-16743$4.95 -
HK Mil-Spec Buffer Tube Kit
HKP HK Parts
$42.95Mil-Spec Buffer Tube Kit Compatible With: HK MR556 & 416 AR-15 style platforms Includes: Made with T7 7075 aircraft-grade aluminum Made in the USA with a polished inside tube Mil-Spec triple hard coat Teflon anodized finish Each unit comes with a...HKP-02735$42.95 -
HK416, MR556 Buffer Tube - Enhanced
H&K Heckler & Koch
$199.95FDE HK 416, MR556 OTB (over the beach) Buffer Tube, Receiver Extension - Commercial Genuine HK German manufactured 416 & MR556 latest generation, marine environment & over the beach buffer tube. Each commercial buffer tube has built in drainage...HKP-18499$199.95 -
Out Of Stock
HK45T, USPC Tactical Thread Protector - 16x1mm LH
H&K Heckler & Koch
$30.95H&K HK45T/USP45T Thread Protector The HK thread protector is a must have accessory when a sound suppressor or muzzle attachment is not in use on your tactical pistol. The thread protector will prevent damages to the threads and crown. Compatible...HKP-21995$30.95 -
HK P7M8, PSP, P7M13 Trigger Return Spring
Grayguns
$35.00Grayguns HK P7M8, PSP, P7M13 Trigger Return Spring The Grayguns HK P7 Trigger Return Spring was designed due to the dwindling availability of parts for the highly popular Heckler & Koch P7. The Grayguns spring is a direct replacement for the...HKP-19760$35.00 -
HK VP40 Conversion Barrel - .40 S&W to .357 SIG - Non-Threaded
RCM
$237.50RCM HK VP40 .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 barrel for the HK VP40...HKP-17373$237.50 -
HK Tactical Pistol Bag - Large - Black with Red Logo
H&K Heckler & Koch
$69.95H&K Tactical Pistol Bag - Large - Black with Red Logo Keep your handgun safe and secure with the HK tactical nylon case. This heavy duty case will accommodate two pistols, accessories and two magazines. Includes movable, velcro-backed modular double...HKP-20468$69.95 -
X5L Gen 3 Universal Laser and Light - Green
Viridian
$409.00Viridian X5L Gen 3 Universal Laser & Light - Green The new Viridian X5L Gen 3 is the latest version of the original green laser sight + tactical light combo. First launched in 2008 this family of products has continued to innovate through the years...HKP-19562$409.00 -
HK VP9, VP9SK, VP40 Firing Pin with Striker
H&K Heckler & Koch
$59.95H&K VP9/VP9SK, HK VP40 Firing Pin w/ Striker New HK German factory firing pin that fits all models of VP series pistols. Compatible With: HK VP9, VP9 Tactical, VP9L, VP9 OR HK VP9SK VP40, VP40 TacticalHKP-16833$59.95 -
Out Of Stock
HK USP Recoil Spring Washer Retainer - Front
H&K Heckler & Koch
$14.95H&K HK USP Recoil Spring Washer Retainer This is the tapered washer that supports and keeps the recoil spring centered and captive on the recoil rod itself. Compatible With: HK USP 9mm HK USP .40 HK USP .45 HK USP Tactical Models HK Elite, Expert,...HKP-17060$14.95