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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HK416, MR556 - Spring - Enhanced Buffer
H&K Heckler & Koch
$19.95Enhanced HK German MR556 & 416 Buffer Spring The HK MR556/416 buffer spring will also work with other AR-15 and M-16 rifles. It is a high-wear item and a must-have replacement part. Compatible With: HK MR556 HK416 HK416 A5 HK M27 AR15, M4 & M16$19.95 -
HK Armorer's Tool Kit
HKP HK Parts
$67.95HKP Armorer's Tool Kit Includes: HK Parts Armorers Puck Punch Bench Block Tool 8 Piece German Rennsteig punch set 20 Piece German Feeler gauge set$67.95 -
HK Pistol Rug Case - Bundesadler
HKP HK Parts
$19.95HKP Pistol Rug - Bundesadler Keep your handgun safe with the HK Parts pistol rug featuring the iconic German Bundesadler crest. This heavy duty pistol case will accommodate one pistol and up to 5 magazines. Features: Measures 8x13" closed and...$19.95 -
HK VP9, P30 Extension Kit - Magazine - 17 Round
HKP HK Parts
$39.95HK Parts Magazine Extension +5 Capacity for HK 17 Round Magazine - HK VP9, P30, P30L New & improved Gen 2 model! HK Parts Magazine Extension +5 kit adds 5 additional rounds to the HK VP9/P30 17 round magazine with the simple swap of the floor plate...$39.95 -
HK416, MR556 Slim Line Buttstock
H&K Heckler & Koch
$97.95H&K HK MR556/416 Slim Line Retractable Stock New from HK Germany the slim line retractable stock fits all commercial & mil-spec AR-15/M16 buffer tubes. Marked with the HK logo and issued on specialized HK 416, MR556 rifles. Compatible...$97.95 -
HK UMP, B&T APC Stock - Folding
H&K Heckler & Koch
$138.95HK German UMP Folding Buttstock Brand new German HK folding stock. This is a required part for the USC-UMP Conversion using the (stock block B). All UMP folding stocks come with an HK date code. Compatible With: HK UMP .45 HK UMP .40 HK UMP 9mm HK...$138.95 -
HK23, HK21, HK11, MG3 Ammunition Belt Starter Tab
H&K Heckler & Koch
$5.95H&K HK21/MG3 Ammo Belt Starter Tab - 7.62x51/.308 Starter tabs for HK21 and MG3 belt-fed rifles. Compatible With: HK 23/21/11$5.95 -
HK UMP Micro Comp - Threaded .578x28 Right Hand
HKP HK Parts
$29.95HKP .45 ACP Micro Comp - Threaded .578x28 RH The HK Parts micro comp & thread protector is designed to be lightweight, and functional as both a compensator and thread protector. The HK Parts micro comp easily attaches to the end of any factory spec ...$29.95 -
HK MP5K, SP89, SP5K Side -Folding Brace - 9mm
SB Tactical
$249.95HK MP5K, SP89, SP5K & Clone - Side Folding Pistol Stabilizing Brace MP5K, SP5K, Zenith Z5P, Z-5K Folding Stabilizing Brace System. These are the last remaining units with an aluminum folding adapter as SB tactical has now switched over to a polymer...$249.95 -
KCI 10 Round HK MP5, MP5K - California Compliant Magazine
KCI
$58.95California Complaint Magazine 10-30 - MP5, MP5K - GEN 2 - KCI USA This California compliant magazine has a 10 round block pre-installed which converts a factory 30 round magazine into a 10 round magazine. This is the best option to stay...$58.95 -
P7 Series 4 in 1 Gas Cylinder Cleaning Tool
USA
$21.95P7 Series 4-In-1 Gas Cylinder Cleaning Tool Made from stainless steel and hand-fitted for perfect fitment on each P7 pistol. Each tool features a 4-in-1 (seven tool) and includes a precisely sized tip for grip screw removal, a gas cylinder...$21.95 -
HK MP5, MP5K Optic Mount - Raised - Picatinny Rail
HKP HK Parts
$109.95HKP HK MP5 Picatinny Rail Optic Mount HK Parts Picatinny style optic mount for the MP5 or MP5K. Quickly mount any Picatinny optic to your HK while retaining a full view of the factory sights. Available exclusively at HK Parts. Compatible With: HK...$109.95