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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HK417, MR762, G28 Castle Nut for Buffer Tube - Extended
H&K Heckler & Koch
$85.95HK G28 Buffer Tube Castle Nut New HK German G28 castle nut for the HK MR762, HK417 & G28 models. Black in color. This is the proper part for use with the G28 buffer tube and stock upgrades. Compatible With: HK MR762 HK 417 HK G28 DMRHKP-16763$85.95 -
On Sale
HK USPC Holster - Paddle - SIGTAC - RH
Itac Defense
Now: $19.95Was: $39.95ITAC Defense HK USPC SIGTAC RH Paddle Holster Made of durable, high-tech black polymer. These right-handed holsters use a unique patented retention system with a zero time to disengage feature. Simply depressing the lever allows for instant removal of...HKP-01972Now: $19.95Was: $39.95 -
HK Leather Sling - Used
H&K Heckler & Koch
$49.95Original Surplus German HK Leather 2 point sling Comes with HK sling hook. Pulled from German military G3 rifles. Complete and in excellent shape overall. Made with leather straps and steel hardware and HK sling hook. Compatible With: HK91 G3 ...HKP-16316$49.95 -
HK MP5 Reverse Stretch Recoil Assembly - 9mm
$37.95Complete Recoil Rod Assembly For The MP5 Reverse Stretch New US made MP5 reverse stretch or MP5 Full size compact recoil rod assembly complete micro polished and built of the finest materials to make the finest US made recoil assembly available. All...HKP-16580$37.95 -
Maglula UZI Magazine Loader, Unloader
Maglula
$29.95Maglula UZI Magazine Loader, Unloader Each part is made to load and unload your 9mm UZI magazines in seconds. This will allow you to do more shooting and less loading. With this loader, magazines can be loaded in 1/3 (60% less) of the time of...HKP-14547$29.95 -
HK P30L Tactical Barrel - 9mm - 5.06" - Threaded 13.5x1 LH
RCM
$225.00RCM HK P30L 9mm Tactical Barrel - Threaded 13.5x1 LH Each barrel is meticulously crafted from ordnance-grade steel, heat-treated, and finished with a durable nitride coating. This is the finest threaded replacement barrel for the HK P30L 9mm pistol,...HKP-16258$225.00 -
Out Of Stock
Picatinny Optic Mount - RMR, SRO
Trijicon
$109.95Trijicon Low Picatinny Rail Mount for RMR/SRO - RM33 Low Picatinny rail mount for RMR/SRO. Includes: Mount Optic mounting screws Distance From Top of Mounting Rail to Optical Axis: RMR: 0.768" SRO: 1.009" Slimline mounts, fits Picatinny railHKP-20335$109.95 -
Kaw Valley Precision 9mm 3-Lug Suppressor Adapter - Threaded 5/8x24
Kaw Valley Precision
$44.99Kaw Valley Precision 9mm 3 Lug Suppressor Adapter - Threaded 5/8x24 The KVP 3-Lug adapters are manufactured to replicate the popular HK pattern 3-Lug interface. Concentricity of ID and OD surfaces are paramount in any suppressor attachment...HKP-19986$44.99 -
Out Of Stock
HK USPC, P2000 Magazine Housing - .40 S&W - 12 Round
H&K Heckler & Koch
$29.95H&K 12 Round HK P2000/USPC .40 S&W Magazine HousingHKP-16538$29.95 -
HK USPC, USPCT Barrel - .45 ACP - 4.46" - Threaded 16x1 LH
H&K Heckler & Koch
$301.95H&K USPC .45 ACP Barrel - Threaded 16x1 LH This H&K USPC .45 ACP barrel features a threaded 16x1 LH design, ideal for enhancing your firearm. Made from cold hammer-forged steel with polygonal rifling, it ensures durability and precision. The...HKP-00320$301.95 -
HK USP Holster - Infidel Max IWB - RH
Comp-Tac
$64.99Comp-Tac HK USP Infidel Max IWB RH Holster The Infidel Max Holster is an all-Kydex inside the Waistband holster with cant adjustment holes to allow the user to change from a reverse cant, speed cant and FBI forward cant. Features: All Kydex body for a...HKP-18248$64.99 -
HK UMP, USC Cocking Lever Spring
H&K Heckler & Koch
$8.95HK UMP & USC Cocking Lever Spring A great spare part to have on hand.HKP-01886$8.95