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.
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
On Sale
HK FMP G3 Early Type De-Milled Front End - No Cocking Handle Assembly
FMP HK CONTRACT
Now: $54.95Was: $68.95HK G3 - FMP Early Type De-milled Front End - No Cocking Handle Assembly Early style G3 front end with no hanger from de-milled FMP G3 parts kits. Perfect for custom builds. Includes: Cocking tube Trunnion Barrel pinHKP-22377Now: $54.95Was: $68.95 -
On Sale
HK G3 Stock Cut Off Section - OD Green
FMP HK CONTRACT
Now: $1.95Was: $2.45HK G3 Stock Cut Off Section - OD Green De-milled G3 stock section. Manufactured by FMP on HK tooling. Compatible With: HK G3, HK91 In-spec. clones and custom buildsHKP-22376Now: $1.95Was: $2.45 -
On Sale
AK Binary Trigger - Curved - BFSIII - 9mm - BLEMISHED
FA Franklin Armory
Now: $385.99Was: $534.95Franklin Armory BFSIII AK-C1 - 9mm - Curved Trigger - 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-19730-BNow: $385.99Was: $534.95 -
On Sale
HK MP5 Thread Protector Cap - .40 S&W, 10mm - 14x.75 - USED
H&K Heckler & Koch
Now: $34.95Was: $49.95H&K Heckler and Koch's Thread Protector Cap Threaded 14x.75 - USED for MP5 .40, 10 ONLY 4 UNITS AVAILABLE - AS PICTURED Priced for ONE cap - Condition Varies by Unit - Each unit Sold INDIVIDUALLY COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL...HKP-00422-BNow: $34.95Was: $49.95 -
On Sale
HK91, G3 Bolt Carrier - Full Auto - Surplus
H&K Heckler & Koch
Now: $97.95Was: $129.95Surplus Full-Auto Steel Bolt Carrier for HK91, G3 SOLD INDIVIDUALLY - VARYING CONDITION SHOWN Used full-auto steel bolt carrier for HK91 and G3 pattern rifles. Manufactured by HK, EBO, or FMP on original Heckler and Koch tooling. Compatible With: HK91,...HKP-22160-MNow: $97.95Was: $129.95 -
HK CC9 Barrel - 9mm - 3.32" - Standard
H&K Heckler & Koch
$174.95H&K CC9 Standard Barrel Made by H&K, this standard barrel for the H&K CC9 pistol provides precise chambering and consistent accuracy. Compatible With: HK CC9HKP-22127$174.95 -
On Sale
HK P2000, USPC Magazine - .40 S&W - 10 Round - Black - USED
H&K Heckler & Koch
Now: $44.95Was: $54.95H&K 10 Round HK P2000/USPC .40 S&W Magazine - Black - USED USED. COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. Factory HK German 10 Round...HKP-00311-BL-BNow: $44.95Was: $54.95 -
On Sale
HK91, G3, PTR Bolt Head - Complete - Used
EBO
Now: $79.95Was: $99.95EBO HK G3 & HK 91 & PTR Bolt Head Complete - Used Greek HK Contract Date Coded EBO bolt head is manufactured in Greece by Hellenic Arms Industry, utilizing HK tooling and prints. Since the 1980s, it has proven to be one of the best upgrades for...HKP-21903Now: $79.95Was: $99.95 -
HK21E, HK23E Compression Springs - Inner Buffer, Outer Buffer
H&K Heckler & Koch
$59.95H&K HK21E/23E Inner & Outer Buffer Compression Springs An unissued set of inner and outer buffer compression springs for your HK21E/23E buffer, sourced directly from HK Germany. Most HK21E/23E buffers in the U.S are first-generation, which use...HKP-21856$59.95 -
HK21E, HK23E Rear Sight Base
H&K Heckler & Koch
$89.95H&K HK21E/23E Rear Sight Base Factory German HK21E/23E rear sight base ready to weld on your build. The rear sight base serves as the mounting point for the rear sight, providing stability and proper alignment for accuracy on your HK21E or HK23E. As...HKP-21849$89.95 -
On Sale
HK MP5K Stock or Brace Adapter - .40 S&W, 10mm - Picatinny Rail
HKP HK Parts
Now: $103.95Was: $129.95HKP HK Parts Picatinny Rail Brace and Stock Adapter for HK MP5K .40, 10 Open your MP5K up to a vast range of brace and stock options with our Picatinny rail stock adapter. Designed specifically for the MP5K 40 cal and 10mm platforms. ...HKP-21833Now: $103.95Was: $129.95 -
On Sale
HK MP5F Bolt Group - Complete - BLEMISHED
H&K Heckler & Koch
Now: $1,895.95Was: $4,399.95H&K MP5 F Bolt Group Complete - BLEMISHED COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. The bolt head, bolt carrier, and all F/A-related parts...HKP-00953-BNow: $1,895.95Was: $4,399.95