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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HK416, MR556, G36, SL8 Piston Ring - Replacement Set of 3 - USA
HKP HK Parts
$8.95HK MR556, HK416 & G36, SL8 Gas Piston Ring Replacement Combo Set - 3 Rings This is a high wear common repair & replacement item. The gas rings are prone to periodic breakage & wear, tear and require them to be replaced periodically...HKP-17933$8.95 -
On Sale
Sig Sauer Compensator - P320-XTEN
HKP HK Parts
Now: $129.95Was: $189.95HKP Sig Sauer P320 X-Ten Compensator Our P320 X-Ten compensator reduces recoil and muzzle flip. Each unit is 100% US-made and finished in durable black cerakote. Our X-Ten compensator features a Picatinny rail to mount lights/lasers. Available...HKP-21190Now: $129.95Was: $189.95 -
Out Of Stock
F5 MFG 50 Round MP5, MP5K 9mm Drum Magazine
F5 MFG
$199.00F5 MFG 50 Round MP5/MP5K 9mm Drum Magazine HK MP5 & MP5K 9mm - 50 Round Drum New 3rd generation redesigned version. Now offered at an even lower price! You asked for it and the long-awaited and highly anticipated MP5 50 Round Drum Magazine designed...HKP-16537-M$199.00 -
HK MP5 Magazine Pouch - Single - 9mm
Comp-Tac
$44.95Comp-Tac HK MP5 9mm 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 HK MP5. The PLM mount allows for being securely hooked on a variety of...HKP-20099$44.95 -
HK33, HK53, HK93, HK91, G3 Complete Stock Buffer Assembly
H&K Heckler & Koch
$24.95HK33, HK53, HK93, HK91, G3 Complete Stock Buffer Assembly - All Mounting Hardware Each unit comes with all of the mounting hardware for installing the G3 buffer to your backplate assembly. Also fits the HK93, 33, and 53 fixed stocks as well (use the same...HKP-00362$24.95 -
Out Of Stock
B&T MP5K/SP89/SP5K 9mm Tri-Rail Handguard
B&T Brugger & Thomet
$265.00B&T MP5K/SP89/SP5K 9mm Tri-Rail Handguard B&T Tri-Rail handguard for HK MP5K platforms. Specifications: Color: Black Height max: 48.4 mm Length max: 86 mm Length of right rail: 82 mm Length of left rail: 64 mm Length of bottom rail: 82...HKP-16889$265.00 -
HK USP45, Mark 23 +10 Magazine Extension
HKP HK Parts
$69.95Magazine Extension - +10 - HK USP .45 & Mark 23 Easy to install. Simply add the mag extension to your existing mag body and follower. No gunsmithing needed. Made 100% in the USA out of aircraft-grade hard coat anodized aluminum with steel hardware...HKP-21371-M$69.95 -
HK91, G3 Cocking Handle Support
H&K Heckler & Koch
$24.95New HK German 91, G3, & PTR Cocking Handle Support A genuine German Heckler & Koch all-steel part. Compatible With: HK91 HK G3 PTR-91 PTR-32 HK .308 Custom builds & clonesHKP-01442$24.95 -
Out Of Stock
HK MP5, MP5K 9mm Anti-Rattle Roller Tipped Paddle Magazine Release
HKP HK Parts
$29.47HK MP5, MP5K 9mm Anti-Rattle Roller Tipped Paddle Magazine Release Latest generation paddle mag release for all 9mm MP5, MP5K style builds. Made to the latest German specs, materials, and design. Compatible With: MP5, 94 MP5K, SP89, SP5K Other...HKP-17570$29.47 -
HK VP Series F2 Trigger - Flat Face
Lazy Wolf
$129.95Lazy Wolf VP Series F2 Flat Face Trigger In a collaboration with Lazy Wolf Guns, HK Parts is offering aftermarket triggers for your HK VP9 & VP40 handguns. The drop in VP9 series is the greatest trigger ever developed after more than a year of...HKP-18747$129.95 -
HK MP5, GSG-5, GSG-522, GSG-5PK Optic Mount
MFI
$109.95MFI HK Low Profile Scope Mount The MFI low profile scope mount was designed exclusively for the GSG-5, Umarex, and HK MP5 .22 models. The MFI mount takes less than 3 minutes to mount on your rifles or pistols. Compatible With: GSG-5,...HKP-01545$109.95 -
HK21 Cocking Handle - Extended Style
HKP HK Parts
$69.95HK Extended Cocking Handle - HK21 Rubberized extended cocking handles for the older style HK21 firearms. This extended cocking handle makes a HUGE difference when trying to charge the HK21 firearm, as it has increased spring pressure and can be a pain to...HKP-00363$69.95