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 VP9 Match Firing Pin - Complete
H&K Heckler & Koch
$69.95Heckler and Koch Complete Firing Pin for your VP9 Match Complete firing pin assembly including firing pin, sleeve, spring, and shell spring washers. Compatible With: HK VP9 Match HK VP9 HK HK VP9L HK VP9SKHKP-22320$69.95 -
HK CC9 Recoil Spring Assembly
H&K Heckler & Koch
$48.95H&K CC9 Recoil Spring Assembly Made in Germany, the recoil spring assembly for CC9 pistol absorbs slide movement and returns the slide to battery during cycling. Compatible With: HK CC9HKP-22128$48.95 -
HK VP9SK, P30SK Magazine Extension - 15 Round
H&K Heckler & Koch
$32.95Heckler and Koch 15 Round Magazine Extension for HK VP9SK and HK P30SK HK VP9SK 15-round magazine extension made from durable black polymer with stippled texture. Compatible With: VP9SK P30SKHKP-21991$32.95 -
HK416A5, MR556 Barrel - 5.56 / .223 - 11"
H&K Heckler & Koch
$424.95Heckler and Koch 11" Barrel for HK416A5, MR556 A4, MR556 A5 Factory German 11" HK416A5, MR556 barrel. Cold hammer-forged and built to HK’s standard for durability, accuracy, and service life. The 1:7 twist rate stabilizes a wide range of 5.56 NATO...HKP-21932$424.95 -
On Sale
HK P30L MOD 1 Compensator - Threaded Barrel
HKP HK Parts
Now: $143.95Was: $179.95HKP HK P30L MOD 1 Compensator - Threaded Barrel The HK Parts MOD 1 compensator strikes a seamless balance of form and function. Users will immediately notice the reduction in muzzle flip and recoil, getting you back on target quicker. Each MOD 1 comp...HKP-21871Now: $143.95Was: $179.95 -
On Sale
HK MP5K to G3 Stock or Brace Adapter
HKP HK Parts
Now: $90.95Was: $113.95HKP HK MP5K to G3 Brace/Stock Adapter The MP5K/G3 adapter enables seamless compatibility between MP5K firearms and G3-style stocks. Designed for a secure and sturdy connection, it's an excellent upgrade for those looking to customize or swap...HKP-21853Now: $90.95Was: $113.95 -
On Sale
HK UMP, USC Top Rail for Optics with Screws - Extended - USED - BLEMISHED
H&K Heckler & Koch
Now: $49.95Was: $99.95H&K HK UMP & HK USC Extended Top Rail For Optics with Screws - USED - BLEMISHED MINOR SCRATCHES. COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE...HKP-20502-BNow: $49.95Was: $99.95 -
On Sale
B&T APC Takedown Pin - Front
B&T Brugger & Thomet
Now: $9.95Was: $11.95B&T APC Takedown Pin - Front Factory B&T front take down pin for the APC receiver. Compatible With: APC Series Standard receiver Glock receiver Sig receiverHKP-21737Now: $9.95Was: $11.95 -
On Sale
HK45 MOD 1 Threaded Barrel Compensator
HKP HK Parts
Now: $143.95Was: $179.95HK Parts MOD 1 Compensator for Threaded Barrel: HK45 The HK Parts MOD 1 compensator strikes a seamless balance of form and function. Users will immediately notice the reduction in muzzle flip and recoil, getting you back on target quicker. Each MOD 1...HKP-21658Now: $143.95Was: $179.95 -
HK416, MR223 Barrel - 5.56 / .223 - 14.5" - Threaded 1/2x28 - A5 Style
HKP HK Parts
$588.95H&K 416 A5 Converted Barrel - Threaded 1/2x28 These barrels began as standard A3 style but have been precisely machined with an A5-style relief cut to fit HK416 & MR223 A5 uppers. Now, you can have a drop-in barrel for your 416/MR223 A5 upper at...HKP-21449$588.95 -
On Sale
HK VP9L Railok™ Threaded Barrel Compensator
HKP HK Parts
Now: $129.95Was: $189.95HK Parts Railok™ Mounting System Threaded Barrel Compensator: H&K VP9L The HK Parts Railok™ mounting system compensator strikes a seamless balance of form and function. Users will immediately notice the reduction in muzzle flip...HKP-21263Now: $129.95Was: $189.95 -
On Sale
HK SEF Skeletonized Binary Aluminum Selectors - For Left Hand Shooters
HKP HK Parts
Now: $55.95Was: $69.95HK Selector Lever Set for BFSIII HK Binary Trigger Pack - SEF Grip Frames - Aluminum Skeletonized SEF skeletonized style selector lever set modeled after the HK style selector lever for the Franklin Armory trigger packs. With our new skeletonized...HKP-20527Now: $55.95Was: $69.95