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
HK21E, HK23E, MSG90 Optic Mount - Picatinny Rail
Michaels Machines
$687.95HK21E/23E Or MSG90 Quick Release Full Picatinny Rail Scope Mount Rock-solid scope made in the USA to factory HK specs. Available exclusively at HK Parts. Please Note: These units are shipped in bulk and will have handling marks on the rails. Units are...HKP-01923$687.95 -
Out Of Stock
HK91, G3 Handguard - Slimline Style - Used Excellent Condition
H&K Heckler & Koch
$0.00Used Authentic German Military Surplus G3 Black Slim Line Forearm With Heat Shield Used in excellent shape. For the money, these are a nice addition to the collection. Each item will fit all full forearm length HK 91, G3, PTR style firearms. Used...HKP-18317$0.00 -
HK91, G3 Key Mod Handguard
HKP HK Parts
$149.95HK G3, HK91 & PTR Low Profile Key Mod Forearm The KeyMod tactical hand guard easily installs on your firearm with minimal effort and locks up solid. No fitting required. Designed from the ground up by roller lock & HK enthusiasts with your...HKP-17178$149.95 -
HK MP5 Trigger Group 3 Position Navy 0,1 Safe Semi Only - Clipped and Pinned - .40 S&W / 10mm
HKP HK Parts
$729.95HKP MP5 40/10 Trigger Group 3 Position Navy Housing (0,1) - Safe/Semi Only - Clipped & Pinned Finally a lower cost alternative to the spendy & hard to find all German HK FBI or 0,1 ambidextrous trigger group in a 4 position Navy factory...HKP-17247$729.95 -
HK MP5, HK94 Recoil Guide Rod
H&K Heckler & Koch
$14.95New HK German MP5, 94 Recoil Guide Rod BarHKP-01054$14.95 -
HK MP5 Helmet Stock - Folding and Adjustable - 9mm
B&T Brugger & Thomet
$379.95B&T MP5 Folding Stock/Length Adjustable Helmet Stock Swiss made B&T folding and length adjustable helmet stock for the HK MP5 and compatible HK MP5 style firearms. This is a military grade stock as supplied by B&T to military and law...HKP-18244$379.95 -
Ergo M-LOK Harris Bipod Mount
Ergo
$33.95M-LOK Harris Style Bipod Mount Features: Contoured to fit Harris-style bipods Black anodized 6061-T6 alum.HKP-17851$33.95 -
On Sale
FMK-3 Spare Parts Kit - Submachine Gun
Other
Now: $179.95Was: $199.95FMK-3 - Submachine Gun - Parts Kit Comes with everything pictured. Used, fair/good condition de-milled parts kits. Kits do NOT include a magazine or barrel. *All NFA Rules Apply*HKP-18479Now: $179.95Was: $199.95 -
On Sale
AR-15 Commercial Buffer Tube Kit
HKP HK Parts
Now: $27.95Was: $47.95AR-15 Commercial Buffer Tube Kit Compatible With: All AR-15 style platforms Not correct length for HK rifles Includes: Made with T7 7075 aircraft-grade aluminum Made in the USA with a polished inside tube Mil-Spec triple hard coat Teflon...HKP-02736Now: $27.95Was: $47.95 -
HK MP5, MP5K Folding Stock or Brace - HDA3
Haga Defense
$349.95HDA3 Stock and Brace for MP5K, SP5K The HDA3 is a modular, USA-made stock and brace system developed by Haga Defense and A3 Industries. Built for strength, adaptability, and cross-platform compatibility, it delivers premium rigidity, smooth...HKP-22355-M$349.95 -
On Sale
AK Binary Trigger - Curved - BFSIII - BLEMISHED
FA Franklin Armory
Now: $385.99Was: $534.95Franklin Armory BFSIII AK-C1 Standard Caliber - 7.62x39 - BLEMISHED DAMAGED PACKAGING - PRODUCT UNAFFECTED COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. The...HKP-19833-BNow: $385.99Was: $534.95 -
Out Of Stock
HK416, MR556, HK417, MR762 Pistol Grip - Tool Included
H&K Heckler & Koch
$159.95HK Heckler and Koch's Pistol Grip with tool - Black Factory German pistol grip in black. Compatible With: HK416, MR556 HK417, MR762 M27 G28 AR-15, M4, & M16 PlatformsHKP-22208$159.95