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
Aimpoint Micro T1, T2 20.4mm Spacer - BLEMISHED
B&T Brugger & Thomet
Now: $64.95Was: $91.00Aimpoint Micro T1, T2 20.4mm Spacer 20.4mm riser for Aimpoint T1 and T2 optics. INSTALLATION MARKINGS COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. Simply...HKP-21682-BNow: $64.95Was: $91.00 -
HK MP5Z German Police Trigger Group With Full Auto Lock Out Lever System - Rare
H&K Heckler & Koch
$879.95Heckler and Koch MP5Z German Police Trigger Group With Full Auto Lock Out Lever System - Rare The MP5Z was a special German police and commercial variant of the Heckler & Koch MP5, designed to adhere to strict German firearms laws that restrict...HKP-99792$879.95 -
On Sale
HK 91, G3 Barrel - FMP - 17.7" - Threaded - 15x1
FMP HK CONTRACT
Now: $487.95Was: $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 17.7-inch length and 15x1 thread pitch for muzzle...HKP-22786Now: $487.95Was: $574.95 -
On Sale
HK21 Bolt Head - FMP - NOS
FMP HK CONTRACT
Now: $627.95Was: $784.95HK21 NOS Bolt Head - FMP Genuine new old stock FMP contract date-coded bolt head for the HK21 platform. Perfect for a replacement or spare as these bolt heads are no longer in production. Compatible with: HK21 (Early and FMP, NOT compatible with...HKP-22711Now: $627.95Was: $784.95 -
On Sale
HK VP9 Optic Mount - ACRO
XS Sights
Now: $61.95Was: $72.95XS Sights ACRO Optics Plate for HK VP9 Optics Ready Pistols XS Sights ACRO optics plate for HK VP9 optics-ready pistols. Machined from steel and finished in black nitride, this plate is built to provide a secure mounting surface for ACRO footprint optics...HKP-22675Now: $61.95Was: $72.95 -
On Sale
HK VP9 Sight Set - Front Sight and Rear RMR Plate - Green Fiber Optic - Suppressor Height
XS Sights
Now: $48.95Was: $57.95XS Sights Green Front Fiber Optic Sight and Rear RMR Optic Plate Set for HK VP9 Optics Ready Pistols - Suppressor Height XS Sights green front suppressor-height fiber optic sight and rear RMR pattern optic plate set for HK VP9 optics-ready pistols...HKP-22674Now: $48.95Was: $57.95 -
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 with: All firearms equipped with a Picatinny...HKP-99445$28.95 -
On Sale
FMK-3 Handguard Grip Set - USED
Other
Now: $18.95Was: $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 included.HKP-99441Now: $18.95Was: $26.95 -
On Sale
Radar 1957 USW-P320 Full Size Holster – Polymer – Fits APL
Other
Now: $129.95Was: $179.95Radar 1957 USW-P320 Full Size Holster – Polymer – Fits APL – Dual 60mm Removable Loops DAMAGED AND OPEN PACKAGING COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART...HKP-99434Now: $129.95Was: $179.95 -
On Sale
HK94 Barrel - Incomplete - USED
H&K Heckler & Koch
Now: $374.95Was: $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 SALES ARE FINAL. Genuine HK Incomplete used barrel for the...HKP-99433Now: $374.95Was: $549.95 -
On Sale
MKE AP5SD Barrel - USED
MKE
Now: $187.95Was: $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: MKE AP5SD THIS CLOSEOUT PART IS NOT ELIGIBLE FOR RETURN, REFUND, OR...HKP-99432Now: $187.95Was: $249.95 -
On Sale
HK21 Barrel Handle with Insert -7.62x51, .308, 5.56, .223 - USED
H&K Heckler & Koch
Now: $68.95Was: $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 handles Compatible With: HK21 THIS CLOSEOUT PART IS...HKP-99431Now: $68.95Was: $99.95