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 -6 Roller For Bolt Head 7.94mm - Under-sized
H&K Heckler & Koch
$27.95H&K -6 Roller For Bolt Head 7.94mm - Under-sized New HK German -6 roller that measures 7.94mm. For use with all HK 90 series firearms. Please Note: The price listed is per roller. Order 2 (pair) for a complete set for the bolt head. An easy way...HKP-00342$27.95 -
On Sale
AR-15 Super Safety - Forced Reset Selector - Ambidextrous Levers
Atrius
Now: $224.95Was: $249.95Atrius Ambidextrous Lever Forced Reset Selector for AR-15 Style Firearms The Atrius Forced Reset Selector gives AR-15 users three selector positions: SAFE, SEMI, and FULL SEMI. It is designed for mil-spec fire control groups in .223, 5.56, and 300 BLK...HKP-22349Now: $224.95Was: $249.95 -
HK MP5K, SP5K Trigger Housing - SEF Universal - 9mm
H&K Heckler & Koch
$199.95H&K Heckler and Koch 9mm SEF Trigger Housing for HK MP5K and HK SP5K A one-size-fits-all approach for the MP5K and SP5K style semi-auto shelf. This is the best option for MP5K and SP5K receivers. Easily interchange the lower trigger group assembly...HKP-20557$199.95 -
HK P2000, P2000SK Night Sight Set - Tru-Dot - Green
Meprolight
$107.95Meprolight HK P2000/P2000SK Tru-Dot Night Sight Set - Green Features: Unequaled Light Performance Brightest Night Sights Available Today Used by Military & Law Enforcement All Tru-Dot sights are covered by a 12-year usable illumination warranty to...HKP-01904$107.95 -
On Sale
HK91, G3, PTR Magazine - 20 Round - Alloy - Like New
Rheinmetall
Now: $17.95Was: $19.95Rheinmetall HK G3, HK91, and PTR91 20 Round Magazine - Like New Rheinmetall G3 alloy mags were made for the German Army and are no longer in production. Once they are gone, they are gone for good. *Although these magazines have been carefully selected,...HKP-22495Now: $17.95Was: $19.95 -
On Sale
HK MP5 1913 End Plate Adapter
MI Midwest Industries
Now: $75.95Was: $89.95MI HK MP5 1913 End Plate Adapter The Midwest Industries Picatinny end plate adapter opens up your stock and brace options to a myriad of off-the-shelf possibilities. The adapter installs in the same manner as the factory end cap with a single push pin...HKP-21493Now: $75.95Was: $89.95 -
Out Of Stock
HK USPC Tactical Barrel - 9mm - 4.28" - Threaded 1/2x28 RH
RCM
$225.00RCM HK USPC 9mm Tactical Barrel - Threaded 1/2x28 RH Each USPC 9mm tactical barrel is crafted from ordnance grade steel, heat-treated, and finished with a durable nitride coating. It is the finest threaded replacement barrel for the HK USPC 9mm...HKP-01705$225.00 -
HK416, MR556, MR762 Forward Assist Pin
H&K Heckler & Koch
$4.95Heckler and Koch's Forward Assist Pin for HK416, HK MR556, and HK MR762 Compatible With: HK416, MR556 HK MR762HKP-02662$4.95 -
On Sale
HK MP5, HK90 Series Paddle Mag Release Bushing - Full Auto
MKE
Now: $1.95Was: $2.59MKE Magazine Release Bushing for HK MP5, MP5K and HK90 Firearms This part is for use in all HK90-series Heckler and Koch weapon systems and is used for installing a paddle mag release. This is not for use on semi-auto HK builds. This part is intended for...HKP-22283Now: $1.95Was: $2.59 -
On Sale
HK45C, USPC Magazine Extension - +7 - .45 ACP
HKP HK Parts
Now: $47.95Was: $59.95HKP +7 .45 ACP Magazine Extension for HK 45C and HK USPC HK Parts magazine extension +7 adds 7 additional rounds to the HK45C, 8 round magazine. Each unit can then be fully assembled into a 15 round HK45C magazine. Ideal for competitive shooters,...HKP-21807-MNow: $47.95Was: $59.95 -
On Sale
HK MP5K Binary Trigger Group – 2 Round Engraved Binary Housing
HKP HK Parts / FA Franklin Armory
$1,087.95 - $1,124.95Franklin Armory / HKP HK MP5K Binary Trigger Group – 2 Round Engraved Binary Housing Our latest and greatest binary trigger group was delivered with a factory HK German housing professionally engraved and painted with a 2-round burst pictograph to...HKP-21114-M$1,087.95 - $1,124.95 -
On Sale
HK P2000, USPC Magazine Extension - +5 - .40 S&W
HKP HK Parts
Now: $39.95Was: $49.95HKP +5 .40 S&W Magazine Extension for HK P2000 and HK USPC HK Parts magazine extension +5 adds 5 additional rounds to the HK P2000, 12 round magazine. It uses the existing mag body, spring, and follower. Just slide the magazine extension on and...HKP-18644-MNow: $39.95Was: $49.95