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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On Sale
Vector Arms V51 Fixed Stock - USA
HKP HK Parts
Now: $184.84Was: $289.95HKP Vector Arms V51 Fixed Stock - USA Fixed A2-style stock assembly configured for the Vector V51 platform. Built using a PTR A2 stock section paired with an HKP V51-specific backplate, converted...HKP-21269Now: $184.84Was: $289.95 -
On Sale
HK MP5 Trigger Pack - Single Stage Semi-Auto - SEF
HKP HK Parts
Now: $286.84Was: $449.95HKP/H&K MP5 9mm Semi-Auto SEF Single Stage Trigger Pack This trigger pack starts as a factory F/A trigger pack before being converted into a semi-auto trigger pack and receiving single-stage trigger...HKP-21083Now: $286.84Was: $449.95 -
On Sale
Flash Hider .22 Cal - Titanium - Silver
Tactical Precision MFG
Now: $33.71Was: $88.99TPM Tactical Precision MFG Flash Hider .22 LR - Titanium This titanium tri-port muzzle brake reduces recoil, muzzle rise, and hides the flash. Dust does not kick up due to three offset front ports...HKP-20778Now: $33.71Was: $88.99 -
On Sale
HK SP5 End Cap with Buffer - QD
HKP HK Parts
Now: $44.96Was: $99.95HKP HK Parts Quick Detach End Cap for HK SP5 With this SP5 QD end cap upgrade you will get a heavier buffer to internally protect your firearm and keep your bolt carrier in tip top condition for...HKP-20757Now: $44.96Was: $99.95 -
Out Of Stock
HK UMP .45 Semi-Auto Bolt Group - Complete
Michaels Machines
$749.95Michaels Machines HK UMP .45 Semi-Auto Bolt Group - Complete MM’s UMP Tungsten filled UMP .45 bolt carrier complete. Heat treated, parkarized and polished for the best look and function possible, as...HKP-20627$749.95 -
On Sale
HK UMP .40 Semi-Auto Bolt Group - Complete
Michaels Machines
Now: $414.34Was: $649.95Michaels Machines HK UMP .40 Semi-Auto Bolt Group - Complete MM’s UMP tungsten filled UMP .40 bolt carrier. Heat treated, parkarized and polished for the best look and function possible, as an added...HKP-20626Now: $414.34Was: $649.95 -
On Sale
HK Single Point Leather Sling - Brown
HKP HK Parts
Now: $44.96Was: $49.95Single Point Leather Sling - Brown Our leather sling utilizes two HK style sling hooks to attach to a single mounting point. Designed to replicate the original, out of production, German HK offering...HKP-20161Now: $44.96Was: $49.95 -
HK MP5 Binary Trigger Group - Ambi 3 Position Universal Housing - .40 S&W, 10mm
H&K Hechler & Koch / FA Franklin Armory
$1,399.95Franklin Armory BFSIII HK-C1 - Trigger Group for MP5 .40, 10mm- Universal Housing Our universal binary trigger group will come set up as a MP5 40/10, but with our Navy 3 position universal housing...HKP-20085$1,399.95 -
Picatinny Optic Mount - Aimpoint T1 - Absolute Co-Witness
Aimpoint
$14.95Aimpoint - T1 Mount Absolute Co-Witness Features a machined recoil lug for consistent, repeatable mounting. Features: 6061 T6 aluminumHKP-19334$14.95 -
HK45C, P30 Holster - Infidel Max - LH
Comp-Tac
$69.95Infidel Max Holster - Left Hand - HK P30, HK45 Compact All-Kydex inside-the-waistband (IWB) holster designed for HK P30 and HK45C pistols. This left-hand configuration features adjustable cant...HKP-19332$69.95 -
On Sale
HK MR556 Rail System - 10" - M-LOK
KDG Kinetic Development Group
Now: $209.96Was: $374.95KDG HK MR556 10" M-LOK Rail System Direct-mount rail system designed to replace the factory HK MR556 handguard. Features a continuous monolithic Picatinny rail at the 12 o’clock position and M-LOK...HKP-19246Now: $209.96Was: $374.95 -
On Sale
HK MP5K, SP5K, SP89 Helmet Stock - Folding and Adjustable
B&T Brugger & Thomet
Now: $265.97Was: $379.95B&T HK MP5K, SP5K, SP89 Helmet Stock - Folding and Adjustable This Swiss-made folding helmet stock offers a compact, military-grade solution for MP5K-pattern firearms. Built from durable polymer and...HKP-18101Now: $265.97Was: $379.95