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 CC9 Trigger Spring
H&K Heckler & Koch
$5.95H&K CC9 Trigger Spring This CC9 trigger spring was made in Germany by H&K and provides spring tension to reset the trigger after firing. Compatible With: HK CC9HKP-22122$5.95 -
Out Of Stock
HK416 A5, MR556 A4 Barrel - 5.56 / .223 - 16.5"
H&K Heckler & Koch
$389.95H&K HK MR556 A4/A5 16.5" Barrel This 16.5" factory H&K MR556 A4 barrel is cold hammer-forged from high-quality steel for exceptional durability, accuracy, and longevity. Manufactured to Heckler & Koch’s exacting standards, it features a...HKP-21931$389.95 -
On Sale
HK416, MR556 Extractor - BLEMISHED
HKP HK Parts
Now: $24.95Was: $39.95HKP HK MR556/416 Extractor - 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 HKP HK MR556/416 extractor is a precision-engineered component designed...HKP-21826-BNow: $24.95Was: $39.95 -
On Sale
HK P30L Conversion Barrel - .40 S&W to 9mm - Threaded - 13.5x1
RCM
Now: $171.95Was: $214.95RCM HK P30L .40 to 9mm Conversion Barrel - Threaded - 13.5x1 This 9mm conversion barrel is a drop-in replacement that allows your P30L to shoot the ubiqutous 9mm cartridge. Includes a thread protector. Each barrel is made from ordnance-grade steel,...HKP-21788Now: $171.95Was: $214.95 -
On Sale
HK USC, UMP Receiver Optic Rail - USED
Now: $52.95Was: $95.00HK USC, UMP Receiver Optic Rail - USED HK USC, UMP top Receiver Rail with mounting hardware. Used in working condition. Includes: Rail 2 mounting screws Compatible With: HK German spec UMP USC upper receiversHKP-19616-USEDNow: $52.95Was: $95.00 -
On Sale
HK VP9 Optic Plate #1 - Meopta, Eotech, Noblex - Red Dot Pistol Mount
HKP HK Parts
Now: $39.95Was: $49.95HKP Mounting Plate #1 - Noblex/Meopta/EOTech - HK VP9, VP9L OR Models Each plate is CNC machined from a solid billet of ordnance grade aluminum, tumbled, and cerakoted for the ultimate in durability and finish. Includes 2 T20 steel torx plus mounting...HKP-21595Now: $39.95Was: $49.95 -
Out Of Stock
HK416, MR556 Barrel - 5.56 - 14.5" - Threaded 1/2"x28 - A5
Nefarious Arms
$594.95Nefarious Arms HK 416/MR556 14.5" A5 Barrel Each Nefarious Arms barrel is cold-hammer-forged and chrome-lined for years of accurate shooting. Grab this expertly crafted barrel for your next SBR or pistol build. Compatible With: HK 416 (A5,...HKP-21590$594.95 -
On Sale
HK UMP 5 Prong Flash Hider - 5/8x24
HKP HK Parts
Now: $53.95Was: $67.95HKP HK UMP 5 Prong Flash Hider - 5/8x24 Compatible With: HK UMPHKP-21523Now: $53.95Was: $67.95 -
HK417, G28 Patrol Handguard - RAL8000
H&K Heckler & Koch
$1,268.95H&K HK 417/G28 Patrol Handguard - RAL 8000 Anodized Genuine HK 417/G28/MR762 patrol handguard anodized in RAL 8000. Compatible With: HK 417 HK MR762 G28HKP-21516$1,268.95 -
On Sale
HKP Racerback Tank - Gray
HKP HK Parts
Now: $7.46Was: $14.95HKP Racerback Tank - Gray Get your hands on some of our premium new apparel! Featuring our sleek new logo printed over soft cotton, this racerback is certain to catch an eye at the range! Features: Female fit Fine cotton High fidelity DTG...HKP-21028-MNow: $7.46Was: $14.95 -
HK VP9SK, VP40SK Backstrap - Large - Black
H&K Heckler & Koch
$29.95H&K VP9SK, VP40SK Backstrap - Large - Black New HK German manufacture. Compatible With: HK VP9SK HK VP40SKHKP-18308$29.95 -
Out Of Stock
Picatinny Vertical Fixed Unigrip
B&T Brugger & Thomet
$119.00B&T Brugger and Thomet Vertical Fixed Unigrip for Swiss made B&T vertical forend grip for picatinny. Made of aluminum Will fit all mil-spec picatinny rails. Measures long. Specifications: Condition: Factory new Color: Black Material:...HKP-18043$119.00