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
HK91, G3 Barrel - 7.62 / .308 - 18" - Threaded 5/8x24
PTR
$214.95PTR HK G3/91 (7.62x51/.308) GI Barrel - Threaded 5/8x24 New PTR91 US made G.I. spec 18" barrel. Perfect for any barrel threaded 5/8x24. New production perfect for new builds. This part counts as one US made compliant part. Specifications: Overall Lenght...HKP-18435$214.95 -
On Sale
HK91, G3 Bolt Carrier - Full Auto - Tungsten - Made by EBO Under HK Contract
EBO
Now: $179.95Was: $199.95Used HK Contract Greek (EBO) F/A Date Coded Tungsten Filled Bolt Carrier. HK German G3 F/A date coded bolt carrier with the tungsten inserts. The tungsten inserts and upgrade is ideal for those that are having bolt bounce issues or want the smoothest...HKP-16572Now: $179.95Was: $199.95 -
On Sale
Harris Bipod Adapter - Picatinny
GG&G
Now: $14.95Was: $39.95Harris Bipod Adapter Made By GG&G Enables a Harris Bi-pod to attach to a mil-spec Picatinny rail. GG&G's AR-15 Harris Bipod Adapter is rugged and low profile. Features of the GG&G Bipod Adapter include a stationary standard swivel stud, a...HKP-02307Now: $14.95Was: $39.95 -
On Sale
HK MP5K Parts Kit - 9mm - Pistol Build
HKP HK Parts
Now: $1,511.95Was: $1,889.95MP5K, MP5K-N Style Pistol Build Kit Complete The finest USA and German-made parts for a complete parts kit for an MP5K, MP5K-N pistol build. Each Kit Includes The Following HK Parts: Barrel - 5.5" button rifled, 3-lugged & threaded 1/2x28 with...HKP-02604Now: $1,511.95Was: $1,889.95 -
Out Of Stock
HK MP5K, SP5K, SP89 Barrel - 9mm - 5.85" - 3 Lug
RCM
$149.95RCM MP5K/SP5K/SP89 9mm Barrel - Non-Threaded 3-Lug This is the only US-made non-threaded barrel that uses the same steel and Cold Hammer Forged (CHF) process as Heckler & Koch. Precision-milled to the latest MP5KN PDW specifications with...HKP-01764$149.95 -
On Sale
HK MP5, MP5SD Cocking Tube Support - Titanium -Universal
HKP HK Parts
Now: $95.95Was: $119.95HKP MP5, MP5SD Universal Cocking Tube Support - Titanium Made from aircraft grade 5 Titanium from the factory HK German print & specs. An HK German quality part made in the USA offered at a great price point. Each MP5 9mm cocking tube support will...HKP-18193Now: $95.95Was: $119.95 -
HK MP5, HK94 Trigger Group - SEF Navy Semi Auto - Clipped and Pinned
H&K Heckler & Koch
$599.95HK Heckler and Koch German SEF Navy Style Semi-Auto Clipped and Pinned Trigger Group Complete for HK MP5 and HK94 Ready to drop on your semi-auto HK 9mm HK Or Clone firearm or upper receiver. Perfect for barreled upper offerings such as the Omega line...HKP-01179$599.95 -
HK416, MR556 ARC-Fire Trigger - V2 with 416 Selectors - 2, 3, 6 Round Options
AS Designs / ST Inc
$279.95AS Design HK416, MR556 V2 ARC-Fire Trigger with 416 Selectors, 0-90-180 and 0-45-90 Position Options, and 2, 3, and 6 Round Options AS Designs' ARC-Fire (Active Reset Clutch) trigger is an innovative take on forced reset triggers. The trigger is...HKP-22707-M$279.95 -
On Sale
AR-15 Ambidextrous Forced Reset Selector (G-LEVER) - Geissele Compatible
Atrius
Now: $241.95Was: $269.00AR-15 Ambidextrous Forced Reset Selector (G-LEVER) - Geissele Compatible Atrius Development forced reset selectors for Geissele triggers. Enables the user to select from 3 positions; SAFE, SEMI (Traditional) and SUPER-SEMI.The G-LEVER is an...HKP-22550Now: $241.95Was: $269.00 -
On Sale
HK MP5, MKE AP5 Trigger Housing - 9mm - Contoured - 0,1
MKE
$42.95 - $59.95MKE AP5, HK MP5 Contoured Trigger Housing - 0,1 This contoured trigger housing is manufactured by MKE for MP5 and AP5 pattern firearms. Designed for 9mm platforms, it provides a factory-correct housing option for MP5-style trigger group assemblies...HKP-99361-M$42.95 - $59.95 -
On Sale
HK CC9 +3 Magazine Extension Kit with Pinky Rest - 9mm
HKP HK Parts
Now: $39.95Was: $49.95HKP HK CC9 +3 Magazine Extension +3 magazine extension for the HK CC9. This low-profile base pad increases a standard 12-round CC9 magazine to 15 rounds. Machined in the U.S. from aircraft-grade hard-coat anodized aluminum with steel hardware...HKP-22476-MNow: $39.95Was: $49.95 -
On Sale
HK MP5 Handguard Conversion - SD Style - MLOK
HKP HK Parts
Now: $259.95Was: $324.95HKP HK MP5 SD Handguard Conversion - M-LOK Transform your standard MP5 into the classic SD-style with the HKP MP5 SD handguard conversion. This drop-in handguard is designed solely for aesthetics, providing your MP5 with the distinctive suppressed SD...HKP-22200Now: $259.95Was: $324.95