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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HK91, G3 Locking Piece - 45 Degree - USED
H&K Heckler & Koch
$14.95Heckler and Koch German Locking Piece for HK G3 and HK91- USED This is the factory correct 45 degree locking piece for HK91 and G3 firearms. Used pulled from de-milled firearms and will range in condition but perfectly usable.HKP-16712$14.95 -
On Sale
Pistol Magazine Loader - .22LR to .380 ACP
Maglula
Now: $31.95Was: $35.95Maglula .22LR - .380 ACP Pistol Magazine Loader The BabyUpLULA is a high-quality pistol magazine loader and unloader designed for loading virtually all* single-stack and narrow-body .22 LR to .380 ACP (9mm Short/Kurz)mags which have normal/...HKP-15637Now: $31.95Was: $35.95 -
On Sale
HK MP5 Magazine Floorplate - .40 S&W, 10mm - US
HKP HK Parts
Now: $7.95Was: $9.95HKP HK Parts Magazine Floor Plate for HK MP5 40,10 Great for spare parts and also a much needed US made compliant part for U.S. compliance.HKP-16507Now: $7.95Was: $9.95 -
On Sale
HK MP5K, SP89, SP5K Cocking Tube - 9mm
HKP HK Parts
Now: $67.95Was: $84.95MP5K, SP89, MP5K-N, MP5K-PDW Cocking Tube - USA This part is built to exact HK German specifications. The only MP5K cocking tube on the market that is a duplicate from factory HK German prints and specs. Compatible With: HK MP5K, SP89,...HKP-01838Now: $67.95Was: $84.95 -
Out Of Stock
HK SP5K Trigger Housing - Ambi Navy 3 Position 0,1,F Pictogram - 9mm Spec Only - Clipped and Pinned
H&K Heckler & Koch
$449.95Heckler and Koch 3 Position 0,1,F Pictogram Ambi Navy Style Housing, Clipped and Pinned for HK SP5K Spec Only 9mm This HK German Navy housing is specifically designed for the HK SP5K. Featuring ambidextrous functionality and pictogram markings, this...HKP-17924$449.95 -
On Sale
HK MP5K Trunnion - 9mm
HKP HK Parts
Now: $45.95Was: $57.95HK MP5K Trunnion - USA US made to exact factory HK specifications for the HK MP5K type builds. Machined completely from ordnance grade steel and heat treated to factory specs. These are the best USA made trunnions on the market. Machined to HK spec...HKP-17964Now: $45.95Was: $57.95 -
HK416, MR556, HK417, MR762 Selector Lever Clamping Sleeve - Ambi
H&K Heckler & Koch
$5.95H&K MR556/MR762/416/417 Ambidextrous Selector Clamping Sleeve German H&K factory clamping sleeve for ambidextrous selector levers on MR556, MR762, HK416, and HK417. Compatible With: HK MR556 A1/A4 HK416 HK MR762 A1/A4 HK417HKP-22062$5.95 -
HK416, MR556, HK417 A4, MR762 Pistol Grip - Black
H&K Heckler & Koch
$47.95H&K MR556/MR762/416/417 A4 Battle Grip - Black Factory H&K battle grip in black. Compatible With: MR556 A1/A4 HK416 HK MR762 A1/A4 HK 417 HK M27 HK G28 AR-15, M4, & M16 PlatformsHKP-22028$47.95 -
On Sale
HK45 Railok™ Threaded Barrel Compensator
HKP HK Parts
Now: $134.95Was: $189.95HK Parts Railok™ Mounting System Threaded Barrel Compensator: H&K HK45 The HK Parts Railok™ mounting system compensator strikes a seamless balance of form and function. Users will immediately notice the reduction in muzzle flip and...HKP-21440Now: $134.95Was: $189.95 -
On Sale
HK P7M8, PSP, P7M13 Trigger Return Spring
Grayguns
Now: $28.95Was: $35.00Grayguns HK P7M8, PSP, P7M13 Trigger Return Spring The Grayguns HK P7 Trigger Return Spring was designed due to the dwindling availability of parts for the highly popular Heckler & Koch P7. The Grayguns spring is a direct replacement for the...HKP-19760Now: $28.95Was: $35.00 -
Out Of Stock
Gear Head Works Tailhook Mod 1 - FDE
Gear Head Works
$159.95Gear Head Works Tailhook Mod 1 - FDE We start with a solid piece of billet aluminum and meticulously machine every aspect for a part that is as nice to look at as it is to use. This version clamps to pistol buffer tubes or adapter spuds ranging from 1...HKP-19541$159.95 -
HK Mark 23 Extractor
H&K Heckler & Koch
$79.95HK German Mark 23 SOCVOM Extractor New HK German manufacture. This item is no longer being made and is a great spare part to have on hand. Compatible With: Mark 23 SOCOM pistolsHKP-01408$79.95