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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Out Of Stock
HK416, MR556, G36, SL8 Piston Ring - Replacement Set of 3
H&K Heckler & Koch
$19.95HKP Gas Piston Ring Replacement Combo Set- 3 Rings The gas rings are prone to periodic breakage and wear and tear and require them to be replaced periodically. These are some of the most common...HKP-00048$19.95 -
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...HKP-19424$8.99 -
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 andHKP-00116$3.95 -
HK MP5, MP5K Cocking Handle - Knurled - Extended
Leapers - UTG
$29.97HK MP5, MP5K Cocking Handle Extended Extended cocking handle for the MP5 style of firearms. These cocking handles also count towards one US made component for 922r compliance. Made by UTG to work...HKP-22421$29.97 -
HK416, MR556, MR762 Buffer Retainer Pin
H&K Heckler & Koch
$3.95Heckler and Koch HK416, HK MR556, HK MR762 Buffer Retainer Pin Compatible With: HK416, MR556 HK MR762HKP-12704$3.95 -
HK MP5K Vertical Foregrip - M-LOK Cantilever Rail
H&K Heckler & Koch
$128.95H&K / Magpul HK MP5K VFG w/Magpul Cantilever M-LOK Rail Factory HK VFG for the MP5K platform adapted by HKP to feature a Magpul M-LOK polymer cantilever rail. The VFG features an M-LOK mounting...HKP-20955$128.95 -
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...HKP-20099$44.95 -
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...HKP-19353$279.95 -
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,...HKP-00363$69.95 -
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...HKP-02401$18.95 -
HK MP5, SP5, MP5K, SP5K Magazine - 30 Round - 9mm - 5 Pack
KCI
$184.95KCI 30 Round HK MP5 9mm Magazine - 5 Pack Features: Latest generation and factory fresh, individually sealed magazine 30-round capacity 9mm caliber marked (9mm x 19)HKP-22057$184.95 -
On Sale
HK VP9 Gen 2 V1 Threaded Barrel Rail Mount Compensator
HKP HK Parts
Now: $74.96Was: $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...HKP-19115Now: $74.96Was: $169.95