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 G36, UMP Folding Stock Release Spring
H&K Heckler & Koch
$9.95HK G36 Folding Stock Release Spring This is the spring that fits under the stock release button to activate the folding and retention of the G36 or UMP stock. Compatible With:HKP-00637$9.95 -
HK USC, UMP .45 Flash Hider - 3 Lug
B&T Brugger & Thomet
$165.00B&T HK USC/UMP .45 Flash Hider - 3-Lug B&T Switzerland has supplied these to law enforcement and military units around the world. Rock solid, mil-spec quality from an H&K OEM manufacturer. This flash...HKP-18346$165.00 -
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 <HKP-20335$109.95 -
HK VP9B Push Button Mag Release Tool
H&K Heckler & Koch
$17.99Heckler and Koch Push Button Mag Release Disassembly Tool - HK VP9 B The factory HK OEM tool used to change the left to right mag release button of the VP9B models. Compatible With: VP9BHKP-19747$17.99 -
HK USPC, P2000 Magazine Housing - .40 S&W - 12 Round
H&K Heckler & Koch
$47.95H&K 12 Round HK P2000/USPC .40 S&W Magazine HousingHKP-16538$47.95 -
Out Of Stock
HK416, MR556 Bolt Head Cam Pin
H&K Heckler & Koch
$31.95Heckler and Koch HK416 and HK MR556 Bolt Head Cam Pin New factory HK German manufactured cam pin for bolt group. A common wear and replacement item. Compatible With: HK 416, MR556HKP-02539$31.95 -
On Sale
HK G36 Backplate, Complete - Recoil Buffer and Assembly
USA
Now: $76.46Was: $84.95HK G36 Backplate Complete With Recoil Assembly New G36 Backplate with new G36/SL8 recoil buffer and recoil assembly. This assembly does include the recoil rod retaining screw. This is a great spare...HKP-18537Now: $76.46Was: $84.95 -
G36, SL8 Bolt Head Ejector Pin
H&K Heckler & Koch
$7.95Bolt Head Ejector Pin For G36 & SL8 This item is the pin that holds the ejector & ejector spring in place. It is a common wear and replacement item and a must-have when doing bolt head maintenance.HKP-01876$7.95 -
On Sale
HK91, G3 Folding Stock
Choate
Now: $133.16Was: $147.95HK91, G3, & PTR - Folding Stock The HK Choate side folding stock is complete with a sling swivel and a new German HK backplate, ready to drop on your favorite HK rifle. No gunsmith is needed as this...HKP-01950Now: $133.16Was: $147.95 -
On Sale
HK416, MR556, HK417, MR762 Flash Hider - G28 Style - Threaded 15x1
MFI
Now: $71.96Was: $79.95MFI HK G28 Style Flash Hider - Threaded 15x1 The G28, 2nd Gen flash hider is threaded 15x1 RH pitch, which is a standard HK Thread Pattern for .308 and .223 caliber weapons. It also has a deep...HKP-16337Now: $71.96Was: $79.95 -
HK MP5K, SP89 End Cap with Buffer - 9mm - Steel
Choate
$45.95MP5K & SP-89 Steel End Cap With Replaceable Rubber Buffer Fits perfectly on all HK MP5K-type builds or projects. All metal construction, so you know it will last. Each unit comes with a sling loop...HKP-00395$45.95 -
On Sale
M-LOK QD Sling Mount
Magpul
Now: $25.16Was: $27.95Magpul M-LOK QD Sling Mount The M-LOK Quick Detach Sling Mount provides a forward attachment point for the Magpul MS4 Sling and other push-button QD slings. Machined from Mil-Spec anodized aluminum,...HKP-17268Now: $25.16Was: $27.95