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 USP Retainer Roll Pin, Buffer Spring - .45 ACP
H&K Heckler & Koch
$7.95HK USP .45 ACP Buffer Spring Retainer Roll PinHKP-02267$7.95 -
Out Of Stock
HK416, MR556 Handguard - Quad Rail with Flip Up Sight
H&K Heckler & Koch
$599.95HK 416A5 9" Quad Rail With Flip Up Front Sight New latest production HK 416A5, MR556 9" quad rail with integrated built in front flip up sight. Latest upgraded design with the laser markings for the adjustable gas block for suppressed and non-suppressed...HKP-17710$599.95 -
On Sale
HK G36, SL8 Recoil Rod Assembly, Complete
USA
Now: $33.95Was: $39.95Recoil Rod Assembly For All - HK G36 & SL8 New G36/SL8 recoil rod assembly complete. Great for replacement or for a spare as these have been hard to find. Made in the USA. Compatible With: G36 SL8HKP-18539Now: $33.95Was: $39.95 -
HK G36 Hammer Spring - Left Side
H&K Heckler & Koch
$8.95HK G36 Left Side Lower Hammer SpringHKP-01856$8.95 -
HK G36K Parts Kit - Buttstock Hinge Section
H&K Heckler & Koch
$3,395.95G36K Parts Kit Complete With Stock Hinge Section Factory German HK G36K parts kit with the rare 3" + stock hinge section. NOT compatible with semi-auto receivers like the S5 Tactical SA receiver without modifying the bolt. For authentic,...HKP-00269$3,395.95 -
Out Of Stock
HK G36, SL8 Recoil Buffer - Factory
H&K Heckler & Koch
$20.95HK G36 Or SL8 Factory Recoil Buffer A critical spare part as these buffers deteriorate with usage and time.HKP-00290$20.95 -
HK UMP, USC, G36 Trigger
H&K Heckler & Koch
$19.95HK UMP, USC & G36 Trigger New HK German factory trigger. A great spare or replacement part. Compatible With: HK G36 HK UMP HK USCHKP-16495$19.95 -
HK USC Magazine Spring
H&K Heckler & Koch
$8.95H&K USC (.45 ACP) 10 Round Factory Magazine Spring Compatible With: HK USC 10 Round magazinesHKP-15284$8.95 -
HK UMP, USC Bolt Catch Spring
H&K Heckler & Koch
$8.95HK UMP & USC Bolt Catch Spring Compatible With: HK UMP HK USCHKP-01900$8.95 -
Out Of Stock
HK MP5SD Barrel - 9mm - Threaded 18x1
HKP HK Parts
$169.95HKP MP5SD 9mm Barrel - Threaded 18x1 Made in the USA from 416 stainless steel, this high-quality barrel undergoes the highly desirable nitride process for a super hard, durable finish. Precision milled to the latest specifications, it features...HKP-17755$169.95 -
HK MP5 Rear Receiver Section
H&K Heckler & Koch
$14.95H&K MP5 Rear Receiver Section HK German demilled receiver section with rear sight base as installed at the factory. MP5 & HK94 Factory HK rear sight bases (portion welded to MP5 receiver), you get the actual demilled section of an MP5 receiver...HKP-02167$14.95 -
On Sale
HK MP5, SP5, MP5K, SP5K Magazine Clamp - Tri-Lock - 9mm
HKP HK Parts
Now: $31.95Was: $39.95HKP HK MP5, SP5, MP5K, SP5K Tri-Lock Magazine Clamp 9mm Triple magazine clamp HK MP5 magazines. Secures three 9mm magazines together for faster reloads and segregating ammo types (FMJ/JHP/subsonic/supersonic). Compatible With: MP5, SP5 MP5K,...HKP-22799-MNow: $31.95Was: $39.95