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 MP5 Receiver Flat - 9mm - no Sling Clip
HKP HK Parts
Now: $151.95Was: $189.95HKP HK MP5 9mm Receiver Flat w/o Sling Clip The MP5 9mm receiver flat serves as the foundation for custom MP5 builds. This version does not include a sling clip cutout, offering flexibility for customization. Precision-engineered for compatibility with...HKP-21828Now: $151.95Was: $189.95 -
On Sale
HK MP5K Brace with Direct Fit Adapter - .40 S&W, 10mm
HKP HK Parts
Now: $191.95Was: $239.95HKP HK Parts Brace with Direct Fit Adapter for HK MP5K .40, 10mm Designed to adapt UMP style and SB Tactical braces directly to the 40,10 K platform. Made in the USA and available exclusively at HK Parts Compatible With: MP5K .40, 10mmHKP-21835Now: $191.95Was: $239.95 -
On Sale
B&T Blast Deflector - Rotex IIA Interface - Glass Breaker
B&T Brugger & Thomet
Now: $251.95Was: $280.00B&T Blast Deflector with Glass Breaker - Rotex IIA Interface B&T blast deflector with glass breaker features a Rotex IIA Interface, designed to work with non-Pro APC223 and APC308 muzzle devices. Compatible With: B&T APC223...HKP-21776Now: $251.95Was: $280.00 -
Out Of Stock
B&T APC Stock or Brace Adapter - Picatinny - 9mm, 10mm, .40 S&W, .45 ACP - No Hydraulic Buffer
B&T Brugger & Thomet
$160.00B&T Picatinny Brace and Stock Adapter - APC9, APC10, APC40, APC45 - Without Hydraulic Buffer The B&T alloy stock and brace adapter for the APC9, APC10, APC40, APC45 features a rear Picatinny interface giving the user a myriad of shouldering...HKP-21759$160.00 -
Out Of Stock
HK G36, SL8 Handguard Eye Bolt - Slings, Bipods
H&K Heckler & Koch
$79.95H&K HK G36/SL8 Sling/Bipod Eye Bolt Factory HK sling and bipod eye bolt for H&K G36 and SL8 rifle models. Steel construction with a durable black finish. Installs easily into the forward portion of the handguard to provide a secure...HKP-21654$79.95 -
Out Of Stock
HK21E, HK23E, PSG1, PTR Extractor
Michaels Machines
$275.95Michaels Machines HK21E, HK23E, PSG1, MSG90 Extractor Replacement extractor for HK21E, HK23E, PSG1, and MSG90 bolt heads. Extractors are a known wear item on these platforms and are no longer produced by HK. The Michaels Machines extractor is a precise,...HKP-21632$275.95 -
On Sale
HK UMP 5 Prong Ported Flash Hider - 5/8x24
HKP HK Parts
Now: $71.95Was: $89.95HKP HK UMP 5 Prong Ported Flash Hider - 5/8x24 5-prong UMP ported flash hider designed for our new UMP 45 parts kit. Not only does it protect exposed threads, it also enhances the appearance of your firearm while delivering flash suppression. Compatible...HKP-21569Now: $71.95Was: $89.95 -
On Sale
FMP HK G3 Manual
Now: $119.95Was: $149.95FMP HK G3 Manual English-translated manuals for the Factory FMP G3 are available now. This is a rare collector's piece and the perfect item for those aiming to assemble a complete FMP G3 parts kit with an authentic factory manual. The cover is inscribed...HKP-21542Now: $119.95Was: $149.95 -
On Sale
HK MP5K Trigger Group - 9mm - Navy Style with AR Grip and Match Trigger
Magpul
Now: $519.95Was: $649.95Magpul HK MP5K AR 9mm Navy Style Match Trigger Group Our improved HK-AR Navy ambidextrous lower housing is now paired with our match trigger pack and a Magpul MOE grip to make this complete MP5K-AR style match trigger group. This trigger group is a...HKP-21378-MNow: $519.95Was: $649.95 -
On Sale
Sig P320C +3 Magazine Extension
Tactical Precision MFG
Now: $22.95Was: $44.95TPM Sig P320C +3 Magazine Extension - Barrett Brown This extension is made from machined 6061 Aluminum. This magazine extension will increase capacity, increase reload speed and mag drops, and overall functionality of your pistol. Easy to install and...HKP-21277Now: $22.95Was: $44.95 -
On Sale
HK MP5 Brace Adapter - Folding
HKP HK Parts
Now: $119.95Was: $149.95HKP - HK MP5 Folding Brace Adapter The HK Parts brace adapter is precision-machined from a solid billet of aircraft-grade aluminum and features integrated QD sling attachment points. It is properly buffered with factory-correct “H” buffers...HKP-21217Now: $119.95Was: $149.95 -
On Sale
HK MP5 Trigger Pack - Single Stage Semi-Auto - SEF
HKP HK Parts
Now: $359.95Was: $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 work. This is the best option for users who...HKP-21083Now: $359.95Was: $449.95