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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Out Of Stock
HK417, MR762, G36 Flash Hider - ROTEX SF - Threaded 15x1 RH
B&T Brugger & Thomet
$269.95B&T Brugger and Thomet Flash Hider fits our HK417, HK MR762, and HK G36 - ROTEX SF B&T flash hider for any 5.56/.223 or 7.62x51/.308 firearm threaded in 15x1 RH. Compatible With: HK416 HK417 HK MR556 HK MR762 HK G36 Rifles threaded 15x1 RHHKP-22162$269.95 -
HK CC9 Firing Pin Return Spring
H&K Heckler & Koch
$5.95H&K CC9 Firing Pin Return Spring OEM firing pin return spring for the CC9 pistol that regulates firing pin movement during cycling to ensure reliable function. Compatible With: HK CC9HKP-22137$5.95 -
HK CC9 Extractor Buffer
H&K Heckler & Koch
$5.95H&K CC9 Extractor Buffer Made in Germany by H&K, the extractor buffer for the CC9 cushions extractor movement and reduces wear during cycling. Compatible With: HK CC9HKP-22131$5.95 -
HK91, G3 Slimline Handguard - Jungle Green - New Old Stock
H&K Heckler & Koch
$39.95H&K 91/G3 (7.62x51/.308) Slimline Forearm - Jungle Green - New Old Stock These are a nice addition to the collection. Compatible With: All full forearm length HK 91, G3, PTR style firearmsHKP-22102$39.95 -
HK MG3 50 Round Assault Drum
H&K Heckler & Koch
$27.95H&K MG3 50 Round Assault Drum H&K manufactured 50-round drum for the MG3. Unissued, but may have light marks or dust from long-term storage. Clips onto MG3 feed trays. With minor modifications, these can be run on HK21, HK21E, and HK51B setups...HKP-22090$27.95 -
On Sale
HK MP5, SP5, MP5K, SP5K Magazine - 30 Round - 9mm - 10 Pack - Cerakoted
KCI
Now: $296.95Was: $349.95KCI 30 Round MP5 9mm Magazine - 10 Pack Get reliable performance and a splash of style with the KCI 30 Round MP5 9mm Magazine 10-Pack. Cerakoted for durability, this pack includes two magazines in each of five distinct colors—perfect for quick...HKP-22066Now: $296.95Was: $349.95 -
On Sale
B&T APC9, APC45 Stock Adapter
B&T Brugger & Thomet
Now: $260.95Was: $289.95B&T APC9, APC45 Stock Adapter Factory B&T stock adapter to fit stocks and braces to APC9 and APC45 platforms. Adapts: B&T UMP folding stock to APC9/APC45 SB Tactical folding brace to APC9/APC45HKP-22033Now: $260.95Was: $289.95 -
HK MR762 A4 Charging Handle
H&K Heckler & Koch
$199.95H&K MR762 A4 Charging Handle Upgrade your MR762 or HK417 style rifle with this factory H&K ambidextrous charging handle, engineered for smooth, reliable operation from either side. Built to Heckler & Koch’s exacting standards, this...HKP-21967$199.95 -
HK417, MR762A4 Magazine Catch
H&K Heckler & Koch
$99.95Heckler and Koch Magazine Catch for HK417 and HK MR762 German-made magazine catch for HK MR762 A4 and HK417. Compatible With: HK417, MR762 A1, MR762 A4HKP-21961$99.95 -
HK21 Cocking Lever Support
H&K Heckler & Koch
$83.95H&K HK21 Cocking Lever Support Authentic HK production cocking lever support for the HK21/A1. This NOS part hails directly from Germany, ensuring the quality and precision of original HK components. Compatible With: HK21 HK21-A1HKP-21821$83.95 -
Out Of Stock
HK416, MR556 Cleaning Kit - Green Pouch
H&K Heckler & Koch
$64.95H&K HK 416/MR556 Cleaning Kit with Green Pouch This is a genuine HK factory cleaning kit. Includes: Nylon storage bag, olive green Nylon brush Cleaning rod, 6 parts Barrel brush Chamber brush Oil brush Oil bottle, empty Cleaning wipes, 50 ea...HKP-21623$64.95 -
On Sale
HK MP5 Alpha Folding Stock With Direct Fit Adapter
MI Midwest Industries
$335.95 - $377.95MI/HKP HK MP5 Alpha Folding Brace/Stock Adapter The Midwest Industries Alpha folding stock paired with the HK Parts Picatinny rail adapter offers unparalleled versatility. Adjust your length of pull, cheek riser, and butt pad to your exact style of...HKP-21512-M$335.95 - $377.95