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 Retaining Spring - FFRS
HKP HK Parts
$4.99HKP HK MR556/HK416 FFRS Retaining Spring The retainer spring retains the handguard locking pin on the free floating rail system (FFRS). These can become damaged with the removal of the handguard screws. Once the spring is damaged, they require...HKP-21503$4.99 -
HK MP5, MP5K Hammer Spring - 9mm
H&K Heckler & Koch
$6.89HK Heckler & Koch HK MP5, MP5K Spring - Hammer - 9mm Each factory HK hammer spring will work in all 9mm & 40/10 trigger packs. Do not settle for an HK contract when you can have HK German for less. Great upgrade for all of the clones that use the...HKP-00064$6.89 -
Out Of Stock
HK MP5 Cocking Handle - Knurled - Extended
HKP HK Parts
$29.95HK MP5, MP5K Cocking Handle Extended Extended cocking handle for the MP5 style of firearms. Each cocking handle offers twice the grabbing area for charging the firearm. Crafted in the US from solid billet aluminum. These cocking handles also...HKP-16999$29.95 -
Out Of Stock
HK VP9, P30 Magazine Conversion Kit - Red Follower - 15 to 17 Round
H&K Heckler & Koch
$24.95HK Magazine Conversion Kit - VP9/P30 - 15 round to 17 round - Red Follower Factory OEM German HK magazine upgrade conversion kit that allows the end user to convert an existing VP9/P30 15 round magazine body/magazine to 17 round capacity. Each kit will...HKP-20683$24.95 -
HK German Roller Retainer Plate For Rollers
H&K Heckler & Koch
$7.95HK German Roller Retainer Plate For All Rollers - Used This item is a common wear item that is great to have on hand as they are one of the top items that break or fail with the use and age of the service weapon. Compatible With All Original 1st...HKP-02690$7.95 -
HK MP5 .22LR Magazine - 10 Round - Walther
H&K Hechler & Koch / Walther
$39.95HK MP5 22 - 10 Round magazine Brand new Walther/HK German manufactured for the HK MP5-A5 & MP5SD .22 rifle & Pistols. Each magazine offers a 10 round magazine capacity & fits all HK, Walther, Umarex MP5 A5 & MP5SD .22 rifles. A good...HKP-19923$39.95 -
HK MP5 Optic Mount - Low Profile - Picatinny
MFI
$124.95MFI's crafted HK MP5 Series Mount - Low Profile Scope - Universal MFI's universal mount will fit all models from 9mm through .308. The sleek design allows the operator to flip the scope mount in either direction without blocking the ejection port (MP5...HKP-00762$124.95 -
HK Push Pin Set - MP5, G3/91, 33/53/93
H&K Heckler & Koch
$15.49HK Set Of Two (One Large And One Small) Push Pins -Used These are great replacements or spare parts to keep on hand. Compatible With: HK91 & G3 53, 33, and 93 MP5, SP5, SP89 PTR and GSG-5 family of guns. Please Note: The GSG5 will take...HKP-00673$15.49 -
Locking Roller - Plus and Minus Sizes
RCM
$8.95RCM Rollers, + & - Sizes RCM US-made locking rollers are available in both plus and minus sizes, making them the ideal choice for adjusting bolt gaps. These rollers are the top-tier locking rollers on the market, delivering unbeatable performance and...HKP-22094-M$8.95 -
HK45C, USPC Magazine - 10 Round - .45 ACP
H&K Heckler & Koch
$49.95New HK German HK45C & USP Compact .45 10 Round Magazine With an extended rubberized base plate. Brand new factory German manufacture. Compatible With: HK45C, HK45C Tactical HK USP Compact 45, HK USPC .45 TacticalHKP-00304$49.95 -
HK Pistol Light Trigger Return Spring
H&K Heckler & Koch
$7.95HK Pistol Light Trigger Return Spring Great for LEM and standard variant conversions. Each spring should be used along with the light-firing pin block spring, as shown below in the related items. Compatible With: HK USP Full Size (9mm, .40 & .45) HK...HKP-02081$7.95 -
HK45, USP, Mark 23 Barrel O-Ring - .45 ACP - Red
HKP HK Parts
$4.95HKP HK .45 Barrel O-Ring All Caliber Pistols - Red A rare find as we have found a small lot of HK red-colored HK .45 O-rings. All HK O-rings are still made of the same material as the newer black O- rings only in the HK red color. A great spare and...HKP-19316$4.95