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 MP5, HK94 Cocking Tube Support - Steel
H&K Heckler & Koch
$84.95New HK Factory German MP5 & HK94 All Steel Cocking Tube Support Each HK cocking tube support is a factory German HK part that comes complete with the detent and spring installed. This part is the perfect upgrade from the cheap metal or plastic...HKP-00094$84.95 -
Out Of Stock
HK MP5 Barrel - 9mm - Threaded 1/2x28 with 3 Lug - Navy - US
HKP HK Parts
$179.95HKP MP5 9mm Navy Barrel - Threaded 1/2x28 - 3-Lug High quality, US-made MP5-N barrel. Built to last and finished in resilient nitride. Precision milled to the latest specs with the factory correct and updated 16 flutes in the chamber. Three lug &...HKP-17926$179.95 -
On Sale
HK416 Compensator - PWS FSC556 Tactical
PWS Primary Weapon Systems
Now: $75.95Was: $89.95FSC556 Tactical Compensator (Muzzle Brake) Compensator The PWS FSC556 has the very best compensation and decrease in muzzle rise. Combine that with enough flash suppression to keep the flash out of your optics and line of sight. Not to mention...HKP-01647Now: $75.95Was: $89.95 -
HK416, MR556 ARC-Fire with Geissele Trigger - V2 with 416 Selectors - Ambi Controls
AS Designs / Geissele
$689.95AS Design HK416 and MR556 V2 ARC-Fire Trigger with Geissele*** Trigger, 416 Selectors, and 0-90-180, 0-45-90, and 0-45-180 Position Options AS Designs’ ARC-Fire (Active Reset Clutch) trigger is an innovative take on forced reset trigger technology...HKP-22803-M$689.95 -
ACR Folding Stock - Telescopic 7 Position - Picatinny Rail
F5 MFG
$224.95 - $249.95F5 ACR Folding Stock - Picatinny Mount - Universal The F5 ACR folding stock easily attached to any Picatinny rail, giving the user the versatility of swapping between any Picatinny equipped firearm. Features: 7-position...HKP-22280-M$224.95 - $249.95 -
On Sale
HK UMP, USC M-LOK Attachment Piece
HKP HK Parts
Now: $24.95Was: $29.95HKP HK UMP/USC M-LOK Attachment Piece Upgrade your UMP and USC with the HK Parts M-Lok attachment piece, designed to eliminate the hassle of snagging and shredding your knuckles on Picatinny rails. This exceptional set significantly expands the range of...HKP-22249Now: $24.95Was: $29.95 -
On Sale
HK MP5, MP5K Optic Mount, ACRO P-1, P-2 - Picatinny
HKP HK Parts
Now: $78.95Was: $98.95HKP HK MP5, MP5K Aimpoint ACRO Picatinny Sight Mount The HKP Aimpoint ACRO Picatinny mount is a rugged, low-profile solution for mounting your ACRO red dot sight. Designed to fit any firearm with a Picatinny rail. It ensures a secure fit, optimal sight...HKP-22067Now: $78.95Was: $98.95 -
On Sale
HK MP5, MP5K Scope Tab - Billeted - Weldment
HKP HK Parts
Now: $7.95Was: $9.95HKP HK MP5/K Billeted Scope Tab - Weldment Billeted scope tab weldment for HK MP5, MP5K, and compatible clones. Provides a correct mounting point for optics. Compatible With: HK MP5/94 HK MP5K/SP89 HK MP5 40/10 Clones or custom buildsHKP-22063Now: $7.95Was: $9.95 -
HK21 Ammunition Belt with Starter Tab - DM1 - 200 Round
H&K Heckler & Koch
$114.95Heckler and Koch DM1 200 Round Belt with Starter Tab - for HK21 7.62x51/.308 Custom 200 round belt for HK21 and MG3 belt-fed rifles because 50 rounds just aren't enough! Compatible With: HK21HKP-21925$114.95 -
Out Of Stock
HK417, MR762 Buttstock - M110A1, G28 SDMR Clone - RAL8000
H&K Heckler & Koch
$489.95HK Heckler and Koch M110A1 G28 SDMR Stock in RAL 8K for HK417 This exceptional stock is the definitive choice for your M110A1, G28 SDMR clone, or any custom build! With its HK E1 Mil-Spec style design, it delivers unmatched quality and performance. The...HKP-21675$489.95 -
On Sale
HK VP9, VP40 Magazine Release - Enhanced - Gen 2 - BLEMISHED
HKP HK Parts
Now: $32.95Was: $49.95HKP HK VP9, HK VP40 Gen 2 Enhanced Magazine Release - BLEMISHED INSTALLATION MARKS COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. The oversized magazine release...HKP-21098-BL-BNow: $32.95Was: $49.95 -
On Sale
HK VP9 R3D 2.0 Rear Sight
XS Sights
Now: $50.95Was: $59.95XS Sight Systems HK VP9OR R3D 2.0 Rear Sight Their second-generation R3D night sights are engineered to give you a brighter stronger set of sights. Easily install their sights with a set that requires 50% less force for installation. R3D sights are built...HKP-21618Now: $50.95Was: $59.95