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
HK91, G3 Magazine Block - 20 to 10 Round Conversion
Raddlock
Now: $5.95Was: $9.95HK 91, G3, & PTR 10 Round Magazine Plug The Raddlock magazine plug is designed to be installed in a 20-round magazine to limit the capacity to 10 rounds for restricted capacity states. Compatible with both aluminum and steel magazines. We...HKP-02443Now: $5.95Was: $9.95 -
HK91, G3 Wood Stock with Enhanced Buffer Installed
H&K Heckler & Koch
$229.95HK German G3, 91, PTR Wood Stock With- Enhanced DMR Buffer Installed Each stock includes: Metal Backplate With Recoil Spring Installed Modified by our HK gunsmith and an enhanced heavy buffer has been installed Heavy Buffer Assembly Complete Wood Stock...HKP-16697$229.95 -
HK91, G3, MSG90 Cleaning Kit - .308 to .351 Calibers
H&K Heckler & Koch
$64.95New - Original HK German MSG90/HK91/G3 Cleaning Kit - Old Stock Each cleaning kit kit comes complete with brass brush, oil brush, oil tube, hand cleaning brush, and pull chain. Originally built for the G3,91 & MG3 but will work on all .308 - .351 ...HKP-19031$64.95 -
HKP (5.56/.223) & (7.62x51/.308) Muzzle Brake - Threaded 15x1 RH - CA/NY Compliant
HKP HK Parts
$24.95HKP (5.56/.223) & (7.62x51/.308) Muzzle Brake - Threaded 15x1 RH - CA/NY Compliant This muzzle device is a partially milled version (not completely milled) of the factory HK birdcage style flash hider found on the factory-correct HK models of rifles...HKP-12746$24.95 -
HK53 Locking Piece #3 - 58 Degree
RCM
$49.99RCM HK 53 Locking Piece #3 - 58 Degree This is the proper locking piece for the HK33K and HK53 firearms as well as some HK51 builds.HKP-02523$49.99 -
HK P30L Holster - Lightcomp™
Comp-Tac
$79.95Comp-Tac HK P30L Lightcomp™ Holster Custom Comp-Tac OWB holster designed exclusively for your Lightcomp™ equipped P30L. Features: Made specifically for use with the HKP P30L Lightcomp™ 0.5" sight channel to accommodate most...HKP-21498-M$79.95 -
HK416 Reaction Rod
Nefarious Arms
$124.95Nefarious Arms - Reaction Rod - HK416 The Nefarious Arms HK416 Reaction Rod is used to securely hold the upper receiver in a bench vise so that work may be performed on the muzzle device. It is inserted through the rear of the upper receiver to...HKP-21272$124.95 -
HKP HK MP5 .22LR Brace/Stock Adapter
HKP HK Parts
$99.95 - $109.95HKP HK MP5 .22LR Brace/Stock Adapter This is the perfect folding stock adapter to replace the polymer end cap on your MP5 .22. CNC machined from a solid billet of aircraft grade aluminum and cerakoted for a durable finish. Compatible with any...HKP-20795-M$99.95 - $109.95 -
HK UMP 2 Position Lower Grip Frame
HKP HK Parts
$184.95HKP HK UMP 2 Position Lower Grip Frame Lower grip frame configured for two-position operation. Designed for use with user-supplied internals and suitable for replacement or build use on HK UMP pattern firearms. Commonly used for USC to UMP conversion...HKP-19384-M$184.95 -
HK45, HK45 Compact, USP Trigger Bar Detent
H&K Heckler & Koch
$5.95Trigger Bar Detent Compatible With: HK45, HK45 Tactical HK45C, HK45C Tactical HK USP 9mm HK USP .40 S&W HK USP .45 ACP HK USP Compact 9mm HK USP Compact .40 S&W HK USP Compact .357 SIG HK USP Compact .45 ACP All USP Tactical, Elite & Expert...HKP-01922$5.95 -
HK UMP (9mm) 30 Round Magazine
H&K Heckler & Koch
$62.95HK German UMP 9mm 30 Round Factory Magazine The latest HK German production 30-round magazine is new and hard to find. Compatible With: UMP 9mm USC 9mm conversions Omega 9mm UMP/USC buildsHKP-00608$62.95 -
Out Of Stock
HK Burst Eccentric Bushing
H&K Heckler & Koch
$54.95HK Burst Eccentric Bushing HK German factory part is found in all HK burst trigger packs. This part is in between the hammer shank hole and the inside of the trigger box hammer axle spacer. This part is one of the most common wear...HKP-02647$54.95