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 Full Size Magazine Floorplate - 9mm / .40 S&W - 13,15 Round - Extended
H&K Heckler & Koch
$29.95HK USP Full Size 9mm/.40 Extended Floor Plate Each new HK German extended floor plate provides additional room for your pinky on the full-size USP 9mm or .40 pistol. An easy swap for your standard floorplate USP 9mm/40 magazines. Compatible With: HK USP...HKP-02478$29.95 -
HK MP5, G3, HK53 Flat Trigger - Enhanced
HKP HK Parts
$49.95HKP 90 Series Flat Trigger - Enhanced With the utmost attention to detail in the design and manufacture of the HK Parts flat 90 series trigger. Each enhanced flat trigger will fit all 0,1 & SEF & Navy style trigger packs. Each trigger counts as...HKP-18364$49.95 -
HK MP5, HK91, G3, HK33, HK93 Optic Mount - Windowed
MFI
$124.95MFI HK G3, 91, 93, 33 PTR & MP5 Scope Mount - Windowed This model is the same as the best-selling low-profile mount, only with added windows for extra weight savings and a viewing window to see the serial numbers on the MP5/94 series of...HKP-02708$124.95 -
HK USP Flashlight Mount - Adapter
GG&G
$69.95GG&G HK USP Pistol Flashlight Adapter - Black With a large number of flashlights and lasers that fit on a Picatinny or MIL-STD-1913 rail, GG&G has designed and manufactured an HK USP full-size flashlight mounting rail adapter meeting the...HKP-01107$69.95 -
HK Lever - SEF - Long Axle Selector - Polymer Housing
H&K Heckler & Koch
$39.95H&K SEF Long Axle Selector Lever - Polymer Housing If you have a polymer SEF housing such as the contoured type with finger grooves or the SEF navy style grip frames as well as the 0,1 polymer housings this is the correct selector lever...HKP-00119$39.95 -
HK91, G3 Recoil Spring
H&K Heckler & Koch
$7.95HK German G3, 91, PTR Recoil Spring Best price in the country, on a new German HK factory recoil spring. No surplus or used springs here. Factory-fresh and HK German. Stock up at this price you can afford to keep a few as spares, why buy surplus springs...HKP-00360$7.95 -
HK MP5 9mm SEF Full Auto Trigger Pack - Complete - Used
H&K Heckler & Koch
$289.95H&K MP5/K 9mm SEF Full Auto Complete Trigger Pack - USED Each factory full auto trigger pack includes a 9mm 3rd generation German ejector lever installed. We do NOT use Pakistani, MKE, or US-made ejector levers in our trigger packs. Each used surplus...HKP-21356$289.95 -
HK91, G3 Extractor
H&K Heckler & Koch
$13.95HK German HK G3, HK, 91 & PTR 91 .308 Extractor New HK German. The G3 is out of production and this small lot of new old stock extractors is available at the best price in the country. Fits all models of HK G3 style firearms and CETME's. Compatible...HKP-00495$13.95 -
HK MP5SD 9mm Cocking Tube
HKP HK Parts
$99.95MP5SD Cocking Tube - US Made HK German MP5SD spec cocking tube for use on MP5SD style builds or custom SD builds. These are the best MP5SD cocking tube ever offered. Each unit is made from the original factory HK prints & tooling to the perfect HK...HKP-15700$99.95 -
HK Rear Sight Oval Washer
HKP HK Parts
$2.95HKP Rear Sight Oval Washer HK German oval washer for the rear sight diopter style assemblies. This is the needed washer used in conjunction with the locking washer. Fits and works with all diopter-style rear sights.HKP-00870$2.95 -
HK VP9SK, P30SK Magazine Extension - Pinky Rest - +2
HKP HK Parts
$24.95HKP +2 HK VP9SK/P30SK Magazine Extension w/ Pinky Rest The mag extension also provides a pinky rest that is super well-balanced and rock-solid. Made in the USA from billeted aluminum. The +2 mag extension not only provides a place to rest the pinky, but...HKP-21076-M$24.95 -
HK416, MR556 Slim Line Buttstock
H&K Heckler & Koch
$97.95H&K HK MR556/416 Slim Line Retractable Stock New from HK Germany the slim line retractable stock fits all commercial & mil-spec AR-15/M16 buffer tubes. Marked with the HK logo and issued on specialized HK 416, MR556 rifles. Compatible...HKP-16244$97.95