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 91, G3 Barrel - FMP - 17.7" - Threaded - 15x1
FMP HK CONTRACT
$574.95Heckler and Koch HK 91, G3 Barrel FMP 17.7 Inch Threaded 15x1 Barrel for Heckler and Koch HK 91 and G3 platforms manufactured under the FMP HK contract. Designed for assembly and replacement with a...HKP-22786$574.95 -
QD Offset Adapter 4mm Compatible with Surefire G2
B&T Brugger & Thomet
$28.95B&T QD Offset Adapter 4mm compatible with Surefire G2Secure your Surefire G2 weapon light to any Picatinny rail section on your firearm with this quick detach, light-weight mount from B&T. Compatible...HKP-99445$28.95 -
FMK-3 Handguard Grip Set - USED
Other
$26.95FMK-3 Handguard Grip Set - Used USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL USED PART SALES ARE FINAL. Comes with everything pictured. Used, fair/good condition. No hardware...HKP-99441$26.95 -
On Sale
HK94 Barrel - Incomplete - USED
H&K Heckler & Koch
Now: $281.21Was: $549.95Heckler and Koch HK94 Barrel - Incomplete - USED ONLY 2 UNITS AVAILABLE - VARYING CONDITION SHOWN - SOLD INDIVIDUALY USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL USED PART...HKP-99433Now: $281.21Was: $549.95 -
On Sale
MKE AP5SD Barrel - USED
MKE
Now: $140.96Was: $249.95MKE AP5SD Barrel - USED USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. Factory MKE used barrel for MKE AP5SD. Compatible With:HKP-99432Now: $140.96Was: $249.95 -
On Sale
HK21 Barrel Handle with Insert -7.62x51, .308, 5.56, .223 - USED
H&K Heckler & Koch
Now: $51.71Was: $99.95HK21 Barrel Handle with Insert -7.62x51, .308, 5.56, .223 - USED USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL USED PART SALES ARE FINAL. Factory German upgrade for HK21 barrel...HKP-99431Now: $51.71Was: $99.95 -
On Sale
SP10 Lower - UMP Style - Rare
Special Weapons
Now: $299.96Was: $524.95Special Weapons SP10 Lower - UMP-Style - Rare UMP-style lower produced for the SP10 platform. Designed to replicate the UMP profile for SP10 builds. Hard-to-find component for SP10 projects and...HKP-99331Now: $299.96Was: $524.95 -
On Sale
HK USP V5, V6, V7 Complete Bobbed Hammer - USED
H&K Heckler & Koch
Now: $29.96Was: $59.95Heckler and Koch HK USP V5, V6, V7 Complete Bobbed Hammer - USED ONLY 1 UNIT AVAILABLE - AS PICTURED <HKP-01934-USEDNow: $29.96Was: $59.95 -
HK21, MG3, MG42 NOS Tripod with HK21 Adapters - Green
DISA (Madsen)
$9,989.95NOS MG3, MG42 ground Tripod with HK21 Adapters This is a Lafette-style ground mount, dated "3/63," manufactured by DISA (Madsen) for use with MG42, MG3, and MG53 machine guns. Original Olive-green...HKP-99414$9,989.95 -
On Sale
M320 40MM Grenade Launcher Front Mounting Bracket for M4 - Incomplete - BLEMISHED
Other
Now: $47.96Was: $149.95M320 40MM Grenade Launcher Front Mounting Bracket for M4 - Incomplete - BLEMISHED ONLY 1 UNIT AVAILABLE - AS PICTURED INCOMPLETE - MISSING RELEASE LEVERHKP-99407Now: $47.96Was: $149.95 -
On Sale
HK33, HK53, HK93 Extractor - USED
H&K Heckler & Koch
Now: $36.71Was: $67.95HK33, HK53, HK93 Extractor - USED ONLY 1 UNIT AVAILABLE - AS PICTURED USED PARTS ARE SOLD AS IHKP-00189-USEDNow: $36.71Was: $67.95 -
On Sale
HK91, G3 Bolt Group - Complete - Semi-Auto - USED
H&K Heckler & Koch
Now: $559.95Was: $849.95Heckler and Koch Complete Semi-Auto Bolt Group for HK91, G3 - USED ONLY 1 UNIT AVAILABLE - AS PICTURED Complete factory German semi-automatic bolt group manufactured by Heckler and Koch forHKP-99389Now: $559.95Was: $849.95