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
HK UMP Lower - SF FBI 0,2 - Safe, Semi
HKP HK Parts
Now: $395.95Was: $495.99New HK Parts -UMP Safe, Semi FBI (0,1) Lower Each lower comes complete with 2 position settings (S, F) and all the internals. This item is ideal for the USC to UMP conversion or to keep as a spare. Compatible With: UMP .45 UMP .40 UMP 9mm USC...HKP-00590Now: $395.95Was: $495.99 -
HK MP5 A3 Retractable Buttstock Buffer
H&K Heckler & Koch
$27.95H&K Heckler and Koch A3 Buffer - Stock - Retractable Stock Buffer for HK MP5 These common wear items need to be replaced when they become yellow, brittle, and worn. Inspect your buffer for the following: discoloration, the buffer becomes hard and...HKP-00074$27.95 -
HK German Sling - 3 Point - Factory Original - Green
H&K Heckler & Koch
$99.953 Point Factory Sling HK German - Green New HK German manufactured. This sling can be used as a 2-point or 3-point sling on your HK firearm. This sling is the factory HK-issued sling that came on the 90 series of firearms. Compatible...HKP-00182$99.95 -
On Sale
HK MP5, MP5K Dual Magazine Clamp Bundle - 9mm
HKP HK Parts / KCI
Now: $95.95Was: $119.95KCI Dual Magazine Clamp Bundle - for 9mm HK MP5 The MP5, MP5K magazine grip or dual magazine clamp. Fits all 9mm MP5 or MP5K curved magazines. Holds two magazines together for ease of use and easy access to 2 magazines. Half the weight of the...HKP-20479Now: $95.95Was: $119.95 -
On Sale
HK MP5 .22 Sling Clip Kit
HKP HK Parts
Now: $19.95Was: $24.95HKP HK MP5 .22 Sling Clip Kit Each unit will fit all models of the MP5 .22 that have the 3 mounting holes on the left side of the magwell. This item installs in a few mins and comes complete with all you need for the install. With the addition of this...HKP-15706Now: $19.95Was: $24.95 -
On Sale
HK Semi Elbow Spring For Trigger Pack - Match Grade
HKP HK Parts
Now: $2.95Was: $3.74Match Grade Semi Auto Spacer Elbow Spring - USA Manufactured using the best isolated oil tempered, select spring steel available for match grade performance and the utmost longevity. For use on all HK semi auto trigger packs. A must have for those...HKP-18002Now: $2.95Was: $3.74 -
HK MP5, MP5K PDW Rear Sight Drum
H&K Heckler & Koch
$53.95MP5 Rear Sight Drum- German This item is the factory-correct rear sight drum for the MP5K PDW or MP5K-N family of firearms. This item is also a popular upgrade for many of the existing clones on the market, as many use factory-incorrect G3 rear sight...HKP-00072$53.95 -
HK P7 Series Pistol Grip Screw
H&K Heckler & Koch
$8.95H&K HK P7 Series Grip Screw HK German P7 series factory grip screw for the left or right side grip. The grip screw commonly strips out or can lose it's new finish with use. This part is a great spare to have on hand. Compatible...HKP-01229$8.95 -
Out Of Stock
HK Mark 23 Optic Plate - Holosun, RMR - Red Dot Pistol Mount
HKP HK Parts
$99.95HKP HK Mark 23 RMR Optics Plate The finest Red dot mounting solution for your HK MK23. New optic plate that replaces your rear sight to allow a Red dot optic to mount on your Mark 23 slide. A quick and easy install that can be done in the matter...HKP-21415$99.95 -
On Sale
Pack of 10 Polish Signal Flares - 26.5MM
Other
Now: $59.95Was: $74.95Pack of 10 Polish Signal Flares - 26.5MM Includes an original, sealed pack of 10 Polish signal flares. The pack of 10 Polish military surplus flares include 2 of each of the following: White Fire, Red Fire, Green Fire, Blue Smoke, and Red...HKP-20793Now: $59.95Was: $74.95 -
HK Contract 3 Point Sling - Black
H&K Heckler & Koch
$44.95HK Contract 3 Point Sling - Black German military surplus 3 point HK sling in like new condition. These slings are completely operational and a great value for the money.HKP-19186$44.95 -
On Sale
HK MP5 Receiver Flat - 9mm - US Made
LSC
Now: $169.95Was: $199.95MP5 Receiver Flat - LSC LSC HK MP5 receiver flat is the most in spec flat that has ever been available. The best option for your HK German parts kit build. This flat is considered by many to be most sought after HK flat available on the market and...HKP-20555Now: $169.95Was: $199.95