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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HK G36 Piston Rod
H&K Heckler & Koch
$55.95Heckler and Kock Gas Piston Rod for HK G36 A must have item for HK G36C conversions from SL8's or for spares for your G36C. New HK German factory part.HKP-16539$55.95 -
Out Of Stock
HK G36 Trigger Group, Complete - 3 Position Navy 0,1,F
H&K Heckler & Koch
$899.95New HK German G36 3 Position Navy (0, 1, F) Trigger Group Complete Perfect for the HK SL8-G36 semi-conversions.HKP-00629$899.95 -
Out Of Stock
HK G36, SL8 Front Sight Screw - Dual and Single Optics - Extended
H&K Heckler & Koch
$9.95Dual/Single Optic Longer Front Sight Screw - HK German HK German manufacturer. This is a required part if you want to install either the dual or single optic. Compatible With:HKP-00801$9.95 -
Out Of Stock
HK G36, UMP, USC Handstop Filler Piece
H&K Heckler & Koch
$59.95H&K UMP/USC/G36 (.40 S&W/.45 ACP/9mm/5.56/.223) Hand Stop Filler Piece HK German Hand Stop filler piece for UMP and G36.HKP-17779$59.95 -
Out Of Stock
HK21E, HK23E, MSG90 Optic Mount - Quick Release Rail
Michaels Machines
$899.95HK21E/23E Or MSG90 Quick Release Rail Scope Mount Made in the USA of the best material and to factory HK specs. First time offered and exclusively here at HKPARTS.NET.HKP-01924$899.95 -
HK MP5 Bolt Hold Open Axle Rod - .40 S&W, 10mm, .357 SIG
H&K Heckler & Koch
$129.95Heckler and Koch HK MP5 Bolt Hold Open Axle Rod - 10mm, .40 S&W, .357 SIG This is the German HK MP5 40/10 bold hold open axle rod. Each unit has the 2 pre-drilled holes for activation screw and...HKP-01469$129.95 -
Out Of Stock
HK MP5K, SP89 Trigger Group - SEF - Contoured - Clipped and Pinned
H&K Heckler & Koch
$0.00New HK German SP89, MP5K Semi Auto - Clipped & Pinned SEF Trigger Group Each unit includes the professionally converted SEF clipped and pinned housing and semi-auto-only trigger pack. All trigger...HKP-01691$0.00 -
HK MP5 F Cocking Tube Support - 9mm, 10mm, .40 S&W
H&K Heckler & Koch
$299.95HK German MP5 F & 40/10 Cocking Tube Support This is the factory correct MP5 F or MP5 40/10 newer style cocking tube support. Compatible With: MP5 40HKP-00097$299.95 -
HK MP5, HK90 Series Trigger Box - Full Auto - SEF only - Used
H&K Heckler & Koch
$175.95Heckler and Koch Trigger Box Full Auto German HK used stripped HK trigger pack This item is for full auto SEF trigger pack internals or can be converted to semi. Not for use with ambidextrous trigger...HKP-16247$175.95 -
On Sale
Fero Z-51 Night Vision Scope - Parts Grade
Zeiss / Eltro
Now: $318.72Was: $499.95Zeiss/Eltro Fero Z-51 Night Vision Scope-Parts Grade Used in non-working condition -SOLD AS IS. Comes shipped in the original German Army transportation case. Good for spare partsHKP-15655Now: $318.72Was: $499.95 -
On Sale
HK33 A2 Parts Kit
H&K Heckler & Koch
Now: $2,897.95Was: $3,489.95HK33 A2 Parts Kit - Used Surplus (Receiver Not Included) Genuine German HK33 A2 parts kit professionally de-milled in accordance with BATF specifications. This kit does not include a receiver. These...HKP-00783Now: $2,897.95Was: $3,489.95 -
On Sale
HK G36 Magwell - Flared - 5.56, .223
Haga Defense
Now: $85.46Was: $94.95Haga Defense Flared Magwell for HK G36 The Haga Defense flared magwell is designed for HK G36 platforms, providing a larger funnel opening for easier magazine insertion. Constructed from...HKP-22916Now: $85.46Was: $94.95