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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Holosun 510 Series Open Reflex Sight - Picatinny Mount
Holosun
$354.95Holosun 510 Series Open Reflex Sight - Universal Picatinny Mount The HS510C is a versatile open reflex optic designed for long gun applications. HS510C is at home on carbines, PCCs, and shotguns due its durable design. HS510C features and aluminum...HKP-21656-M$354.95 -
HK MP5 Magazine Spring - .22LR - 10 Round
HKP HK Parts
$3.95HKP 10 Round MP5 .22LR Magazine Spring New fresh production mag spring for your HK MP5 .22 magazine. Please note: This spring can also be used to convert the 10 round magazine to a 10 round magazine. It has come to our attention that Walther has made...HKP-20297$3.95 -
HK416 OTB E1 Buttstock and Buffer Tube Set
H&K Heckler & Koch
$469.95H&K MIL-SPEC 416 OTB Buffer Tube & HK E1 Stock Combo Genuine HK416 E1 Stock with the new style marine environment "over the beach" buffer tube. Buffer tube has ball bearing rollers to tighten the stock when locked in position, and helps smooth...HKP-20104$469.95 -
HK MP5, GSG Magazine Pouch - Single - .22 LR
Comp-Tac
$44.95Comp-Tac HK MP5 .22/GSG .22LR 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 MP5 .22 & GSG .22 The PLM mount allows for being securely...HKP-20100$44.95 -
Out Of Stock
HK33, HK93, G3K M-LOK Modular Handguard
DTAC Dakota Tactical
$189.95DTAC HK93, HK33, HK33K, and G3K M-LOK Modular Handguard Modular M-LOK handguard system designed for HK93, HK33, HK33K, and G3K pattern firearms. Precision machined in the USA from T6 aluminum, this one-piece main body provides a rigid mounting platform...HKP-20015$189.95 -
HK91, G3 Magazine - .308 - 10 Round - Used
H&K Heckler & Koch
$64.95H&K 10 Round HK 91, G3, PTR .308 Magazine - Used Each HK magazine is made by using a factory German HK 20 round mag that is then professionally converted to 10 rounds. Perfect for shooting bench or prone as the 20 round magazines are to long and get...HKP-19887$64.95 -
HK417, MR762, G28 Firing Pin
H&K Heckler & Koch
$64.95H&K HK MR762/417/G28 Firing Pin This firing pin is a must have wear and tear replacement item for your MR762 or HK 417 Firearm. Compatible With: MR762 HK 417 G28HKP-16613$64.95 -
HK45, P30 Holster - Warrior - RH
Comp-Tac
$74.95HK P30, P30L, HK45, HK45C Warrior Holster/Stealth FootprintOWB Holster for Concealed Carry or Competition The Warrior Holster is Brand New, released January of 2018. The Warrior Holster design offers a stealth footprint, outside the waist band carry that...HKP-17455$74.95 -
HK MR556, MR762 Rail Segment - 5 slot
H&K Heckler & Koch
$39.95HK MR556 & MR762 Rail Segment - MRS 5 slot Rail ASM New Factory HK 5 slot rail segment for the MRS style HKey mod rail forearms. ***Not compatible with the Euro spec HKey "Small", this is for the Modular Rail System "Large type" HKey spec, which is...HKP-17510$39.95 -
HK G36, SL8, HK417, MR762 Bolt Head Ejector
H&K Heckler & Koch
$19.95H&K HK G36/SL8/MR762/417 Bolt Head Ejector Compatible With: HK MR762 HK 417 HK G36 HK SL8HKP-01868$19.95 -
HK MP5 Locking Roller +6 - .40 S&W
HKP HK Parts
$11.95HK US MP540 Locking Roller, +6 The proper roller size is essential for proper headspacing of bolt gap. Please Note: The price listed is per roller. Order 2 (pair) for a complete set for the bolt head. An easy way to remember the size you need to...HKP-17565$11.95 -
HK91, G3 Fixed Buttstock with Enhanced Heavy Buffer - Alpine Green - Surplus
H&K Heckler & Koch
$129.95HK German Surplus G3, 91, PTR Stock Complete with Enhanced Heavy Buffer Installed - Alpine Green The Alpine green stock was the last version that the German military produced and is the darkest green version available. All stocks are 90's...HKP-18934$129.95