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 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 -
On Sale
HK USP, P30, P2000 Hammer Spring - Light
HKP HK Parts
Now: $6.95Was: $8.95HKP HK USP/P30/P2000 Light Hammer Spring Finally a New US Production 10 lb. Hammer Spring For HK USP, P30 & P2000. Brought about by many customers asking for a 2 lb. lighter hammer spring than stock (12 lb.). This is also a popular hammer spring used...HKP-16489Now: $6.95Was: $8.95 -
On Sale
HK MP5, SP5, MP5K, SP5K Magazine - 9mm - 30 Round - Molykote® - Seconds
Other
Now: $25.95Was: $36.95Turkish Contract MP5, SP5, MP5K, SP5K 9mm Molykote® 30 Round Magazine - Seconds Turkish contract 30 round 9mm magazine for HK MP5 and MP5K pattern firearms. Finished with Molykote®, a specialty anti-friction coating formulated to help reduce...HKP-22559Now: $25.95Was: $36.95 -
On Sale
HK MP5, MP5K Replacement Parts Kit
MKE
Now: $19.95Was: $24.95MKE Replacement Parts Kit for your HK MP5 and HK MP5K Firearm Keep your MP5 or MP5K in peak condition with this comprehensive MKE HK MP5/MP5K replacement parts kit. Manufactured to exacting standards by MKE, this kit includes high-quality replacement...HKP-21896Now: $19.95Was: $24.95 -
On Sale
HK MP5 Optic Mount - Low Profile - Picatinny
MFI
Now: $111.95Was: $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-00762Now: $111.95Was: $124.95 -
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 -
HK45C, USPC Magazine - .45 ACP - 10 Round
H&K Heckler & Koch
$59.95Heckler and Koch 10 Round Magazine for HK45C and USP Compact - .45 ACP HK German 10-round magazine for HK45C and USPc pistols chambered in .45 ACP. Features an extended rubberized base plate and factory HK construction. Compatible...HKP-00304-M$59.95 -
Out Of Stock
HK33, HK53, HK93 Magazine - 30 Round - Steel
H&K Heckler & Koch
$72.95HK93, HK33, & HK53 - 30 Round Magazine HK Factory German. All-steel latest production magazine and hard to find. This magazine was discontinued in 2021 and is no longer in production. Stock up as we have the last remaining units available...HKP-00484$72.95 -
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 -
On Sale
HK416, MR556 Retaining Spring - FFRS
HKP HK Parts
Now: $3.95Was: $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-21503Now: $3.95Was: $4.99 -
HK Vertical Foregrip - Short - Picatinny
HKP HK Parts
$24.95HKP Vertical Grip - Picatinny Mount - Short This grip is by far the nicest shorter style or stubby grip we have encountered for the money. This rock solid grip is a must have for anyone that uses a vertical grip. This is the only vertical grip out there...HKP-16409$24.95 -
On Sale
HK45, USP, Mark 23 Barrel O-Ring - .45 ACP - Red
HKP HK Parts
Now: $3.95Was: $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-19316Now: $3.95Was: $4.95