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 MP5 Parts Kit - A2 Buttstock and SEF Lower - 9mm - 100% German
H&K Heckler & Koch
$2,239.95HK German MP5 9mm Used Parts Kit Complete (Minus Receiver) All MP5 Kits Include: HK 3-Lug MP5 Barrel - cold hammer forged Cocking Tube Front Sight Tower Wide Forearm - Black Bolt Group - MP5 Full Auto 2 small and 1 large Push Pin 30-Round Curved...HKP-00771$2,239.95 -
Out Of Stock
HK MP5 A3 Retractable Buttstock Sling Attachment Bar - Weldable
H&K Heckler & Koch
$9.95HK MP5 A3 Retractable Stock Sling Bar This part offering is a factory German HK part new unpainted and ready to weld to your application. Can also be used for upgrading a non-ambi stock to an ambi stock by attaching the sling bar to the A3 stock...HKP-17427$9.95 -
On Sale
M-LOK Bipod Mount
Magpul
Now: $19.95Was: $29.95Magpul M-LOK Bipod Mount The Magpul M-LOK Bipod Mount allows for the attachment of Harris®-style stud mounted bipods to M-LOK compatible hand guards and forends. The M-LOK Bipod Mount offers a low-profile, robust, and elegant mounting solution for...HKP-17269Now: $19.95Was: $29.95 -
On Sale
HK45 Magazine with Extension - 20 Round - Complete
HKP HK Parts / Heckler & Koch
Now: $55.95Was: $89.95HKP and Heckler and Koch 20 Round Complete Magazine with Extension for HK45 Complete 20 round magazine for the HK45 built with a German HK 10-round magazine body and an HKP 10-round magazine extension. Constructed from steel and polymer, this...HKP-22858Now: $55.95Was: $89.95 -
Out Of StockOn Sale
HK MP5, AP5 Telescopic Stock - 4 Position
MKE
Now: $395.95Was: $465.95MKE 4 Position Telescopic Stock for MP5, AP5 MKE 4-position telescopic stock for MP5-pattern firearms. Designed to provide a compact, adjustable stock option for compatible builds while retaining the classic MP5 telescoping profile. Built for...HKP-22857Now: $395.95Was: $465.95 -
On Sale
HK91, G3, HK33, HK93 Bayonet Adapter Replacement Kit - Turkish Contract
Other
Now: $11.95Was: $14.95Turkish Contract Bayonet Adapter Replacement Kit for HK91, HK G3, HK33, HK93 Turkish contract replacement hardware kit for early-style bayonet adapters. Intended for use with pre-ban pattern adapters on compatible HK roller-delayed rifle platforms...HKP-22518Now: $11.95Was: $14.95 -
On Sale
HK CC9 Magazine +3 Extension Kit - 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-22488-MNow: $39.95Was: $49.95 -
On Sale
HK MP5, AP5 Front Sight Tower - CRACKED - GUNSMITH SPECIAL
MKE
Now: $9.95Was: $49.95MKE AP5, MP5 Front Sight Tower - CRACKED - GUNSMITH SPECIAL SOLD INDIVIDUALLY - CRACKED COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. Please Note: Will require...HKP-22220-BL-BNow: $9.95Was: $49.95 -
On Sale
HK45C Railok™ Threaded Barrel Compensator - BLEMISHED
HKP HK Parts
Now: $96.95Was: $189.95HKP HK45C Railok™ Threaded Barrel Compensator - BLEMISHED ACTUAL UNIT MAY HAVE MARKINGS THAT DIFFER SLIGHTLY FROM THE ONE PICTURED. COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL...HKP-21264-BNow: $96.95Was: $189.95 -
On Sale
HK Mark 23 Thread Protector - Knurled - 16x1 RH
HKP HK Parts
Now: $15.95Was: $19.95HKP .45 ACP Thread Protector - Threaded 16x1 RH for HK Mark 23 Thread protector designed for HK Mark 23 and SOCOM barrels threaded 16x1 RH. Machined steel with a durable nitride finish and knurled exterior for secure installation and removal...HKP-22286Now: $15.95Was: $19.95 -
On Sale
HK USP45 Tactical MOD 1 Threaded Barrel Compensator
HKP HK Parts
Now: $143.95Was: $179.95HK Parts MOD 1 Compensator for Threaded Barrel: H&K USP Tactical .45 ACP The HK Parts MOD 1 compensator perfectly blends form and function, setting a new standard in muzzle control. Experience a significant reduction in muzzle flip and recoil,...HKP-22262Now: $143.95Was: $179.95 -
Out Of Stock
HK MP5 Recoil Rod Assembly
RCM
$54.95RCM HK MP5 Recoil Rod Assembly The recoil rod and spring assembly is a great item to have on hand for replacement and spares as this is a consumable part. Compatible With: HK MP5 NOT compatible with SP5 with the F-style recoil rod MP5 clones and custom...HKP-22202$54.95