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
HK MP5K, SP89 Bolt Carrier - Full Auto - 9mm - USA
RCM
$184.95MP5K Full Auto Bolt Carrier - US- Made - RCM This part is machined from billet ordnance steel. Our US-made MP5K carrier is made to the most updated and latest MP5K F specs. Tungsten filled, heat...HKP-01190$184.95 -
Out Of Stock
HK MP5SD Locking Piece - 115 Degree - 9mm
RCM
$33.95RCM MP5SD 9mm Locking Piece - 115 Degree This locking piece is a US-made version of the factory German MP5SD 115-degree locking piece. Each locking piece is made 100% here in the USA from ordnance...HKP-02192$33.95 -
On Sale
HKP .45 ACP Vented Micro Comp - Threaded 16x1 LH
HKP HK Parts
Now: $23.95Was: $29.95HKP .45 ACP Vented Micro Comp - Threaded 16x1 LH The HK Parts micro comp & thread protector is designed to be lightweight, and functional as both a compensator and thread protector. The HK Parts...HKP-20211Now: $23.95Was: $29.95 -
Out Of Stock
HK UMP Magazine - 25 Round - .45 ACP
H&K Heckler & Koch
$145.95New HK Heckler and Koch Non-LE, Mil Marked .45 ACP 25 Round Magazine for HK UMP The UMP .45 magazines will fit all UMP factory firearms as well as the USC's that have been converted to accept UMP...HKP-00605$145.95 -
On Sale
HK45C, USPC Magazine Extension - +4
HKP HK Parts
$35.03 - $49.95HKP HK Parts +4 Round .45 ACP Magazine Extension for the Compact HK45 and HK USP HK Parts magazine extension +4 adds 4 additional rounds to the HK45C, 8 round magazine. Each unit can then be fully...HKP-18654-M$35.03 - $49.95 -
On Sale
HK MP5 Handguard - SL - .22LR
Magpul
Now: $79.97Was: $99.95Magpul HK MP5 .22LR SL Handguard This forearm has been CNC machined to fit the HK MP5 .22 model specifically. The factory unit will not fit. HK parts took the time and made the modification possible...HKP-20480Now: $79.97Was: $99.95 -
HK USP Match Trigger Conversion Kit
H&K Heckler & Koch
$189.95Heckler and Koch HK USP and HK USP Tactical Match Trigger Conversion Kit The HK USP Match Trigger Kit is a true drop-in kit for USP full-size pistols. This will fit all of the HK German USP 9mm, .40,...HKP-01039$189.95 -
Out Of Stock
HK UMP, USC Barrel Roll Pin
H&K Heckler & Koch
$11.94Heckler and Koch German made USC and UMP Universal Barrel Roll Pin HK recommends replacing the barrel pin when the barrel is removed with a new barrel pin. This is a great spare part to have on hand...HKP-00603$11.94 -
HK MP5K, SP5K Stock or Brace Adapter - Picatinny Rail
HKP HK Parts
$129.95HKP HK MP5K/SP5K/SP89 Picatinny Rail Brace/Stock Adapter Our rail stock adapter allows you to attach any 1913 Style Stock, Brace to your MP5K.The 1913 style stocks & braces lock in place and provide...HKP-21385-M$129.95 -
Modular Linear Compensator Body - Mach 3
Kaw Valley Precision
$39.95Kaw Valley Precision Mach 3 Modular Linear Comp Body The KVP MACH 3 is a user configurable linear compensator system. 1-1/8"x28 TPI internal threads accommodate common suHKP-19984$39.95 -
HK MP5, SP89, HK91, G3, HK93, HK94, SP5K Grip Screw and Washer
H&K Heckler & Koch
$1.49H&K Grip Screw & Washer This is a surplus factory HK German part that is now out of production. Great to have as a spare and the cheapest price on the planet. Compatible With:HKP-16335$1.49 -
HK91, G3, PTR Magazine - 20 Round - Aluminum - USED - FMP
FMP HK CONTRACT
$11.95FMP Portuguese HK91, G3, PTR 20 Round Aluminum Magazine - Used Portuguese FMP 20-round aluminum magazine for HK91, G3, and PTR pattern rifles. A solid factory-style magazine option for range use,...HKP-22713$11.95