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, MP5K, HK93, HK91 Sight Clamping Screw - Rear Retainer
H&K Heckler & Koch
$4.95HK German Rear Sight Retainer / Clamping ScrewHKP-00868$4.95 -
HK SP5K Micro Comp - Knurled - Threaded 1/2x28
HKP HK Parts
$26.95HKP HK SP5/K 9mm Knurled Micro Comp - Threaded 1/2x28 Our SP5 micro comp has the appearance of a standard factory style thread protector but now extended and slotted to provide a micro comp feature. The added slots help mitigate gasses allowing the...HKP-21374$26.95 -
HK45 Tactical Magazine Extension - +3
HKP HK Parts
$49.95HKP HK Parts +3 Magazine Extension for HK45 and HK45 Tactical HK45 & HK45 Tactical +3 magazine extension adds three additional rounds to the 10 round factory HK45, HK45 Tactical magazine. Made in the USA out of aircraft grade hard coated in HK red...HKP-18385-M$49.95 -
HK USP Magazine - 9mm - 10 Round
H&K Heckler & Koch
$49.95H&K 10 Round HK USP 9mm Magazine Perfect for those that live in magazine restrictive states or for those that require a 10 round mag capacity. Compatible With: HK USP 9mm HK USP 9mm Tactical HK USP P8HKP-01239-M$49.95 -
HK SP5K Bolt Carrier - Full Auto
RCM
$189.95HK SP5K Specification Full Auto Bolt Carrier - US Made Machined completely from billet ordnance grade steel. The HK SP5K carrier is made to the most updated and latest MP5K F specs that will fit the SP5K. Tungsten filled, heat treated, & factory...HKP-17932$189.95 -
On Sale
HK MP5, HK90 Series Ejector Lever Axle
MKE
Now: $13.46Was: $17.95MKE Trigger Pack Ejector Lever Axle Fits all SEF & Ambidextrous style HK trigger packs regardless of caliber. MKE product made on HK tooling. Fits all of the following 90 series trigger packs: SEF, O,1 Navy BurstHKP-22241Now: $13.46Was: $17.95 -
HK UMP Folding Stock
HKP HK Parts
$119.95Folding Buttstock - GSG9 New UMP folding stock. This is a required part for the USC-UMP Conversion using the stock block B. Compatible With: UMP9 UMP40 UMP45 HK USC-UMP conversions Can also be used on B&T firearm and stock applications for a 1"...HKP-19910$119.95 -
Out Of Stock
HK USPC Pistol Light, Laser Adapter - Mount - Gen 2
USA
$27.95USP Compact Pistol Laser & Light Adapter This is the adapter needed for all HK USP Compact pistols to attach an aftermarket light or laser to the bottom rail of the firearm since HK USP's use a proprietary rail system. Made from hard coat anodized...HKP-00959$27.95 -
Sling Pin O-Ring - Ambi
H&K Heckler & Koch
$1.95H&K Ambidextrous Sling Pin O-Ring HK ambidextrous sling pin replacement O-ring for all ambidextrous sling pins. This item is a common wear/breakage part that does need to be replaced from time to time. This is the part that creates the + seal to keep...HKP-01090$1.95 -
Out Of Stock
HK Mark 23 Micro Comp - Threaded 16x1 RH
HKP HK Parts
$29.95HKP HK Mark 23 .45 ACP Micro Comp - Threaded 16x1 RH The HK Parts Micro Comp & Thread Protector is a lightweight, fully functional accessory that serves as both a compensator and thread protector. It attaches easily to any factory spec 16x1 RH Mark...HKP-21319$29.95 -
HK VP9, P30 Magazine, Complete - 22 Round - Red
HKP HK Parts
$79.95HK PARTS 22 Round Magazine Complete with Red Extension and Red Follower for HK VP9 and HK P30 HK Parts +5 magazine extension coupled with a 17 round factory German magazine body adds 5 additional rounds total for a fully assembled 22 round HK VP9...HKP-19414$79.95 -
Grip Cap Spring - HK Navy Style
H&K Heckler & Koch
$4.95H&K Grip Cap Replacement Spring This is the replacement spring that is used on both the US and German made grip caps that can become damaged and broken with use. A great idea to have on hand as the spring will get bent and destroyed with use. We use...HKP-16408$4.95