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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HK21 FMP Parts Kit, 7.62x51
FMP HK CONTRACT
$1,938.95H&K HK21 FMP Parts Kit, 7.62x51 Seize your opportunity to secure a piece of history! These HK21 parts kits were manufactured by the Portuguese government under license from HK using HK's tooling, dies, and prints. Each HK21 kit has been...HKP-21393$1,938.95 -
HKP .40 S&W Vented Micro Comp - Threaded 14.5x1 LH
HKP HK Parts
$29.95HKP .40 S&W Vented Micro Comp - Threaded 14.5x1 LH The HK Parts Micro Comp & Thread Protector is designed to be lightweight, and 100% functional as both a compensator and thread protector. The HK Parts Micro Comp easily attaches to the end...HKP-19955$29.95 -
Out Of Stock
HK USP, USPT Magazine - .45 ACP - 12 Round - Standard Floorplate
H&K Heckler & Koch
$59.0012 Round HK USP .45 ACP Standard Floorplate Magazine New HK German USP 45 12-round magazine with standard floor plate (no extended finger rest) as this mag sits flush. Compatible With: HK USP .45 Full-Size Pistols HK USP .45 TacticalHKP-02374$59.00 -
HK416, HK417, MR556, MR762 Takedown Pin - Rear - A1 Style
H&K Heckler & Koch
$79.95H&K HK MR556/MR762/416/417 Rear Lower Receiver Locking Pin This is the rear takedown pin with ball detent and locking mechanism installed. The idea behind this type of system is to decrease the movement of the upper and lower receivers and improve...HKP-02672$79.95 -
HK91, G3 Complete F/A Trigger Pack (SEF) - Used
H&K Heckler & Koch
$299.95H&K G3/91 (7.62x51/.308) SEF Complete F/A Trigger Pack - USED A Heckler & Koch genuine part. The best price anywhere for a complete surplus German trigger pack. This offering is a full auto HK SEF .308 trigger pack complete with all internals...HKP-00522$299.95 -
HKP +5 HK P2000/USPC 9mm Magazine Extension
HKP HK Parts
$49.95HKP +5 HK P2000/USPC 9mm Magazine Extension HK Parts magazine extension +5 adds 5 additional rounds to the HK P2000, 13 round magazine. It uses the existing mag body, spring, and follower. Just slide the magazine extension on and tighten it and you're...HKP-18661-M$49.95 -
HK UMP, USC Stock Block B - Push Pin Style
HDPS
$209.95New Latest Production HDPS HK USC/UMP Stock Block -B Pin Style For use with all HK UMP factory or US-made folding stocks. Each unit comes with a new push-pin design. This is a required part of the HK USC-UMP style conversion. Each part is the latest...HKP-00773$209.95 -
HK90 Series Trigger - Used
H&K Heckler & Koch
$14.95H&K 90 Series Trigger-Used German 90 series surplus trigger in used condition taken from demilled HK German G3 firearms. Compatible With: HK91, G3, PTR HK93, 33, 53 HK MP5, 94, Zenith, POF, MKE Clone or other custom buildsHKP-17920$14.95 -
On Sale
HKP 25 Round HK UMP 40 25 Round Magazine - FDE
HKP HK Parts
Now: $24.95Was: $49.95HKP 25 Round HK UMP 40 25 Round Magazine - FDE THIS SHADE OF FDE HAS BEEN DISCONTINUED. STOCK UP AT HALF PRICE BEFORE THEY ARE SOLD OUT FOR GOOD. Made from advanced polymer material with steel feed lips just like the German UMP 40 magazine...HKP-20519Now: $24.95Was: $49.95 -
HK91, G3 Optic Mount - 220mm - Low Profile - Extended Picatinny Rail
B&T Brugger & Thomet
$199.95B&T Mounting Rail Low Profile Mount for HK G3, Long Extended Version Low profile rail that allows the use of iron sights while installed. Specifications: Color: Black Height max: 30.7 mm Length max: 220 mm Material: Aluminum NATO Accessory Rails:...HKP-16873$199.95 -
Out Of Stock
HKP, HK 19 Round HK Mark 23 / USP .45 ACP Complete Magazine
HKP HK Parts / Heckler & Koch
$109.95Magazine Extension Complete - 19 Round - HK Mark 23/USP .45 Designed specifically for the Mark 23 and USP .45—perfect for those who want extra firepower at the range. Each magazine comes fully assembled and ready for immediate use. We expertly take...HKP-21586$109.95 -
HK UMP Paddle Magazine Release
H&K Heckler & Koch
$16.95UMP Paddle Magazine Release This is a common repair and replacement part as they are easy to break on the UMP lower. Simple and easy to install with no gunsmith needed or required. Compatible With: UMP .45 UMP .40 UMP 9mm Please Note: This...HKP-00810$16.95