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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On Sale
HK VP9 Gen 2 V1 Threaded Barrel Rail Mount Compensator
HKP HK Parts
Now: $99.95Was: $169.95HKP HK VP9 Gen 2 V1 Threaded Barrel Rail Mount Compensator Made specifically for the VP9 Tactical or VP9 with Threaded barrel - Version 1 - Gen 2 This HK Parts VP9 Threaded Barrel Rail Mount Compensator is the perfect accessory for your firearm...HKP-19115Now: $99.95Was: $169.95 -
HK GSG-5 Rear Sight
H&K Heckler & Koch
$18.95H&K GSG-5 Rear Sight This item will fit all GSG-5 models, including the PK and P models. This item is an all-steel HK-made part designed for combat and the toughest of environments. Each HK factory sight comes as shown and is...HKP-02401$18.95 -
GSG-5, GSG-16 Magazine - 22 Round - .22LR
GSG German Sports Guns
$29.95GSG German Sports Guns 22 Round .22LR Magazine for GSG-5 and GSG-16 The GSG magazine is a standard factory replacement magazine. The magazine is made from high-quality polymer and features a matte finish. Compatible...HKP-00794$29.95 -
HK416, MR556, HK417, MR762, G28 Pistol Grip - A5 Style - Gen 2 - RAL8000
H&K Heckler & Koch
$44.95Heckler and Koch A5 Grip V2 - RAL 8000 HK416, MR556, HK417, MR762 G28 A5 Compatible With: HK416, HK416 A5, HK MR556 HK417, HK417 A2, HK MR762 HK M27 HK G28 AR-15, M4, & M16 Platforms Please Note: Color representation is based on Heckler &...HKP-18467$44.95 -
HK MP5 Replacement Buffer For Folding Stock Or End Cap
Choate
$3.95Choate MP5 Replacement Buffer For Folding Stock Or End Cap Compatible With: Choate MP5 and MP5K Stocks or End Caps (NOT compatible with MP5 .22 LR)HKP-00116$3.95 -
HK USP, USPT Magazine with Extension - .40 S&W - 18 Round
HKP HK Parts
$79.95HKP/H&K USP/T .40 S&W 18 Round Complete Magazine With Extension HK Parts magazine extension adds 5 additional rounds to the full size USP & USP Tactical, 13 round magazine. Each unit is then fully assembled as an 18 round magazine. Ideal for...HKP-18643-M$79.95 -
HK MP5, SP5 Folding Brace
B&T Brugger & Thomet / SB Tactical
$279.95B&T MP5/SP5 Folding Brace - Swiss/US Factory Swiss B&T MP5, SP5 Folding Pistol Brace with the SB Tactical/B&T components assembled. A rare offering using the B&T Swiss manufactured folding polymer end cap with sling swivel slightly used...HKP-19353$279.95 -
HKP Roller +1 - New - 8.01mm
H&K Heckler & Koch
$8.99Roller +1 - New - 8.01mm HK Parts Standard (8.01 mm) locking roller, The proper roller size is essential for proper bolt gap. US Manufacture. Please Note: The price listed is per roller. Order 2 (pair) for a complete set for the bolt head. An easy way to...HKP-19424$8.99 -
HK91, G3 Rear Sight - Surplus
H&K Heckler & Koch
$14.95HK German G3, 91, PTR Rear Sight Assembly Good - Very Good HK German factory sight. We offer the finest used German HK sights at the BEST price in the country. Each German HK used sight was hand selected & picked from to be the finest examples of all...HKP-18092$14.95 -
HK USP Tactical Barrel - .45 ACP - 5.07" - Threaded 16x1 LH
H&K Heckler & Koch
$310.99H&K USP .45 ACP Tactical Barrel - Threaded 16x1 LH HK USP .45 ACP German factory threaded barrel for use with flash hiders or sound suppressors. This is a drop in barrel for any of the HK USP .45 ACP pistols. No gunsmith is required as this is an...HKP-00319$310.99 -
HK21 Cocking Handle - Extended Style
HKP HK Parts
$69.95HK Extended Cocking Handle - HK21 Rubberized extended cocking handles for the older style HK21 firearms. This extended cocking handle makes a HUGE difference when trying to charge the HK21 firearm, as it has increased spring pressure and can be a pain to...HKP-00363$69.95 -
HK MP5 Magazine Pouch - Single - 9mm
Comp-Tac
$44.95Comp-Tac HK MP5 9mm Single Magazine Pouch The single magazine pouch PLM is an all Kydex magazine pouch which gives a smooth friction free surface perfect for a quick reload for your HK MP5. The PLM mount allows for being securely hooked on a variety of...HKP-20099$44.95