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 Pistol Field Cleaning Kit - .45 ACP
H&K Heckler & Koch
$69.95H&K HK .45 ACP Pistol Field Cleaning Kit This is a genuine HK factory cleaning kit and is recommended by HK for all HK pistol owners. Compatible With: HK45, HK45 Tactical HK45C, HK45C Tactical USP 45, USP 45 Tactical USPC 45, USPC...HKP-01245$69.95 -
HK USP Barrel - 9mm - 4.86" - Threaded 13.5x1 LH - Standard
H&K Heckler & Koch
$320.95H&K USP 9mm Standard Threaded Barrel - Threaded 13.5x1 LH This Heckler & Koch factory threaded barrel is a drop-in replacement for USP 9mm SD models. It can also be used on standard USP 9mm full-size models, but the O-ring should be removed for...HKP-17809$320.95 -
HK MR556 A1, A4 Bolt Group - Complete
H&K Heckler & Koch
$529.95H&K HK MR556A1 and A4 Complete Bolt Group Complete semi-auto bolt carrier group for MR556A1/A4 receivers. Bolt carriers will be marked ".223 Rem" or "5.56 x 45". Includes The Following: MR556 Bolt Carrier Complete bolt head Firing pin...HKP-02618$529.95 -
HK MP7, G36, SL8 Gas Block Pin
H&K Heckler & Koch
$8.95H&K HK G36/SL8/MP7 Gas Block Pin The G36/SL8/MP7 gas block pin is the largest out of HK's line up (UMP/USC, 415/MR556, 417/MR762).HKP-16727$8.95 -
On Sale
HK91, G3, MP5 Ambidextrous Selector Lever - Right Side - Low Profile
HKP HK Parts
Now: $34.95Was: $39.95Low Profile, No Contact - Ambidextrous Selector Lever - Right Side This is the right side selector of the ambidextrous trigger packs that is low profile and does not interfere with the hand when the selector lever is in the fire, burst and F/A...HKP-17898Now: $34.95Was: $39.95 -
On Sale
HK MP5 Optic Mount - Raised Aimpoint Acro
HKP HK Parts
Now: $107.95Was: $134.95HKP HK MP5 Raised Aimpoint Acro Optic Mount HK Parts brings you one of the most requested optic mounts for the MP5 platform. An elevated design with a direct Aimpoint ACRO mounting interface. Our ACRO mounts provide an unobstructed view of the factory HK...HKP-21666-MNow: $107.95Was: $134.95 -
On Sale
HK VP9 Micro Comp - Slotted - Threaded 13.5x1 Left Hand
HKP HK Parts
Now: $23.95Was: $29.95HKP 9mm Slotted Micro Comp - Threaded 13.5x1 LH The HK Parts Micro Comp is a lightweight micro comp that also functions as a thread protector. Quickly thread the micro comp on any 13.5x1 left-hand threaded 9mm barrel. Developed to migitgate recoil to...HKP-21653Now: $23.95Was: $29.95 -
Out Of Stock
HK91, G3 Barrel - 7.62 / .308 - 17.7" - Threaded 15x1 RH
RCM
$264.95RCM HK G3/91 (7.62x51/.308) Barrel - Threaded 15x1 RH Made by RCM to the highest tolerances and finest material available. Perfect for that HK build or to replace that shot-out barrel. Each barrel counts as 1 US-compliant part as a bonus. These are...HKP-01136$264.95 -
On Sale
HK416, MR556 2-Stage Trigger
Geissele
Now: $440.95Was: $489.95Geissele Automatic's two stage trigger for the HK MR 556 rifle. The HK MR556 trigger is similar to Geissele's SSA with a 4.5 total pull weight. It can be used in both the HK 556 and semi-auto HK 416's. Each Trigger comes with full installation...HKP-16464Now: $440.95Was: $489.95 -
HK91, G3 2x20 Mag Pouch - Flectarn - New
H&K Heckler & Koch
$13.95New HK German Camo Mag Pouch New Flectarn Camo Magazine Pouch Fits 2 X 20 Round Magazines. New latest issue German dual mag pouch. Holds two 20 round magazines that attaches to German web gear. Each unit comes in the new style German forest flectarn camo...HKP-16268$13.95 -
HK MP5, HK33, HK53, HK93, HK91, G3 Catch with Roller for SEF, Navy Trigger Packs - USED
H&K Heckler & Koch
$4.49Friction Sear-USED For SEF, Navy Trigger Packs hk335393, 91, G3, Used in excellent condition, HK German Friction Sear for SEF & Navy trigger packs. This item is also referred to as the catch with roller but more commonly called a sear.HKP-16197$4.49 -
On Sale
HK91, G3, HK33, HK53, HK93 Bayonet Adapter - Hardware Included - USED
H&K Heckler & Koch
Now: $119.95Was: $149.95Heckler and Koch German Bayonet Adapter with Screw and Hardware - USED USED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL USED PART SALES ARE FINAL. DOES NOT COME WITH HARDWARE HK German Bayonet Adapter with...HKP-00021-USEDNow: $119.95Was: $149.95