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
HK MP5SD Barrel Shroud - Enhanced
HKP HK Parts
Now: $116.96Was: $129.95HKP MP5SD weldable suppressor shroud for HK MP5 SD builds The HKP SD shroud is fully de-burred with the handguard attachment lugs being machined in from the outset, not welded, which is commonly...HKP-15701Now: $116.96Was: $129.95 -
Out Of Stock
HK MP5K Vertical Foregrip - M-LOK 3 Slot Rail
H&K Heckler & Koch
$128.95H&K / Magpul HK MP5K VFG w/Magpul 3 Slot M-LOK Rail New German HK VFG for the MP5K platform is now M-LOK compatible and comes pre attached with a Magpul M-LOK 3 slot Rail. The perfect combination to...HKP-20956$128.95 -
HK91, G3 Rear Sight Assembly
H&K Heckler & Koch
$39.95HK German G3, 91, PTR Rear Sight Assembly Complete - HK German factory rear sight assembly with all hardware included. We offer the new HK sights at the BEST price in the country. Each set comes...HKP-18163$39.95 -
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 23/21/11HKP-21439$5.95 -
HK G36, SL8 Barrel Mandrel
Other
$109.95Barrel Mandrel For Removal and Installation of HK G36 and HK SL8 Barrels A mandrel barrel changing tool for firearms is a specialized rod inserted into the barrel to provide internal support and...HKP-02608$109.95 -
HK USP, Mark 23 Enhanced Magazine Extension Kit - .45 ACP - +5
HKP HK Parts
$49.95HKP HK USP .45 ACP/Mark 23 Enhanced Magazine Extension Kit +5 HK Parts USP .45/Mark 23 enhanced +5 magazine extension. Our design represents a symbiotic balance of form and function. The added...HKP-21458-M$49.95 -
On Sale
HK91, G3, PTR Dual Magazine Clamp
HKP HK Parts
Now: $23.96Was: $29.95HK91, G3, PTR - .308/762 Dual Mag Clamp The HK91, G3 magazine grip or dual magazine clamp. Holds two magazines together for ease of use and easy access to 2 magazines. Half the weight of the factory...HKP-19634Now: $23.96Was: $29.95 -
Out Of Stock
HK MP5 Bolt Carrier - Full Auto - 9mm
RCM
$184.95MP5 9mm Full Auto Bolt Carrier - RCM New US RCM manufactured MP5, 94 F/A carrier with all current "F" style upgrades and tungsten filled for the best performance and the utmost reliability. They were...HKP-01188$184.95 -
HK90 Series Trigger and Catch Axle
H&K Heckler & Koch
$1.99HK Sear & Trigger Axle For 90 Series- Used Surplus Condition HK German used sear and trigger axle for the 90 series style of trigger packs. Each axle pin or pivot pin measures .197 inches (5.0mm). A...HKP-15459$1.99 -
HK416, MR556, HK417, MR762 Pistol Grip with Storage - Black
H&K Heckler & Koch
$49.95Heckler and Koch's Pistol Grip with Storage for HK416, HK MR556, HK417, HK MR762 New HK German factory battle grip with a storaHKP-00033$49.95 -
On Sale
HK USPC, P30 Magazine Adapter
X-Grip
Now: $12.76Was: $15.95X-Grip HK USPC/P30 Magazine Adapter The XGRIP HKUSPC is a new patent pending OEM factory accessory for the HK USP Compact that enhances the versatility, look, and feel of the gun. Features:HKP-16671Now: $12.76Was: $15.95 -
On Sale
HK 9mm Thread Adapter - Barrel - Converts 13.5x1 To 1/2x28 LH
Kaw Valley Precision
Now: $26.96Was: $29.95Kaw Valley Precision 9mm Thread Adapter Converts your HK 9 mm Barrel from 13.5x1 LH To 1/2x28 Converts barrel thread pitches to match desired muzzle device thread pitches. For example, this adapter...HKP-19991Now: $26.96Was: $29.95