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 LS5 Trigger Group, Complete - Semi Shelf
Lee Sporting
$549.95Lee Sporting LS5 Complete Trigger Group - MP5 Semi-shelf The LS5 trigger group from Lee Sporting is a definitive ergonomic upgrade over the OEM grip, boasting a weight reduction of 4.3oz compared to...HKP-20465$549.95 -
Out Of Stock
HK45 HD Night Sight Set - Orange
Trijicon
$159.95Trijicon HK45 HD Night Sight Set - Orange The HD Night Sights were specifically created to address the needs of tactical shooters. The three dots green tritium night sight sets front sight features a...HKP-14556$159.95 -
HK P2000 9mm Recoil Spring Assembly
H&K Heckler & Koch
$105.95HK P2000 9mm Recoil Spring Assembly Spring guide rod with buffer complete. Compatible With: HK P2000 9mmHKP-01559$105.95 -
HK45 Thread Protector - .578x28 RH - Knurled
HKP HK Parts
$14.95HKP HK Parts HK45 Thread Protector - Threaded .578x28 RH - .45 ACP The new US-made .45 ACP tactical thread protector, the cap fits all HK45 full size & compact barrels threaded .578x28 RH thread. A...HKP-17623$14.95 -
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 &HKP-02578$107.99 -
HK USP, USP Compact Lock Out Key
H&K Heckler & Koch
$9.95Heckler and Koch HK USP and HK USP Compact Lock Out Key A great spare that fits all USP and USPC models and variants.HKP-01409$9.95 -
HK USP Series Hammer Strut Pin
H&K Heckler & Koch
$7.95HK USP Series Hammer Strut Pin Cylinder Pin ISO 8750 - 1.5 x 8mm. Compatible With: HK USP 9mm HK USP 40 S&W HK USP Compact 9mm HK USP Compact 40 S&W HK USP Compact 357 SIG HK USP Compact 45 ACPHKP-01633$7.95 -
Out Of Stock
HK MR556, MR223 Upper Receiver - Forward Assist and Ejection Door
H&K Heckler & Koch
$694.95New HK German Partially Pre-Assembled Upper Receiver for HK MR556 and HK MR223 Each unit comes just as shown with the F/A (forward assist) assembly and ejection port door assembly installed from the...HKP-16950$694.95 -
HK416, MR556 Extractor
H&K Heckler & Koch
$74.95HK 416 & MR556 Bolt Head Extractor New HK - German Compatible With: HK MR556 HK 416 CR556 HHKP-00036$74.95 -
Out Of Stock
HK G36C Barrel Conversion and Front End Kit - 5.56 / .223 - 8.9" - Threaded 15x1
HKP HK Parts
$889.95G36C Barrel Front End Barrel Kit - 223/556 New production HK G36C style barrel conversion kit and front end kit. Each kit will include the necessary parts to build a G38/SL8 variant into the G36KC...HKP-18228$889.95 -
Out Of Stock
HK G36, SL8 Bolt Head Ejector Pin
$6.95HK G36/SL8 (5.56/.223) Bolt Head Ejector Pin HK Ejector roll pin for G36, SL8 bolt heads. This item is the pin that holds the ejector & ejector spring in place. A common wear & replacement item and a...HKP-18372$6.95 -
HK UMP Release Lever Spring
H&K Heckler & Koch
$9.95HK UMP Release Lever Spring For All UMP LowersHKP-01891$9.95