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
HK45 Railok™ Compensator
HKP HK Parts
Now: $97.46Was: $189.95HK Parts Railok™ Mounting System Compensator: H&K HK45 The HK Parts Railok™ mounting system compensator strikes a seamless balance of form and function. Users will immediately notice the reduction...HKP-21113Now: $97.46Was: $189.95 -
On Sale
HK MP5 Tri-Rail Handguard
PTR
Now: $134.96Was: $149.95PTR MP5 Tri-Rail Forearm US made and comes with 3 independent 4" removable rails that are fully modular and able to add and remove at will. Made in the USA. Low profile and the most modular of any...HKP-17782Now: $134.96Was: $149.95 -
HK416, MR556, MR762 Clamping Sleeve Safety Lever
H&K Heckler & Koch
$7.95H&K HK MR556/MR762/416 Clamping Sleeve Safety Lever There are one of the same pin on both sides. Compatible with: HK MR556 <HKP-15252$7.95 -
HK416, MR556 Magazine - 20 Round
H&K Heckler & Koch
$74.95Heckler and Koch HK 20 Round HK MR556 and HK416 5.56/.223 Magazine New HK416 and HK MR556 Factory 20 Round Steel Maritime Coated Magazine. Will fit and work in all AR-15/M16 weapons. Perfect for...HKP-00029$74.95 -
HK UMP, USC Buttstock Axle Pin
H&K Heckler & Koch
$30.95HK German UMP Rear Stock Axle Pin This is the HK factory German stock pin that allows you to attach the stock to either the factory receiver of a UMP or for those that are doing the USC to UMP...HKP-00604$30.95 -
HK91, G3 Magazine Release Set
H&K Heckler & Koch
$34.95Heckler and Koch Magazine Release Set (Left to Right) for HK91, G3 This HK German manufactured magazine release set for HK .308 pattern rifles consists of 4 pieces. Includes: Magazine CatchHKP-00929$34.95On Sale
HK91 Polymer To Metal Trigger Group Conversion Kit
HKP HK Parts
Now: $192.06Was: $225.95HK 91/PTR 91 Polymer To Metal Trigger Group Conversion Kit. This is everything you will need to convert the lower trigger group on your HK 91 from polymer to metal housing with contoured grip. Just...HKP-17362Now: $192.06Was: $225.95On Sale
HK VP9 Gen 2 V.2 Rail Mount Compensator
HKP HK Parts
Now: $39.35Was: $149.95HKP HK VP9 Gen 2 V.2 Rail Mount Compensator CLEARANCE COMPENSATORS ARE NOT AVAILABLE IN ANY COLORS ASIDE FROM WHAT IS PURCHASABLE ON THE WEBSITE. WE WILL NOT BE RUNNING THESE COMPENSATORS AGAIN SO...HKP-21141-MNow: $39.35Was: $149.95
HK P7 Series Drop Safety Catch Spring
H&K Heckler & Koch
$9.95HK P7 Drop Safety Catch Spring This is one of the most common wear items on the P7 series of firearms—a must-have spare part and hard to find. Compatible With: PSPHKP-01353$9.95
HK MP5, MP5K Optic Mount - 5 5/8" - MLI - Picatinny Rail - RAL8000
H&K Heckler & Koch
$399.99HK German Low Profile Mount For HK MP5, MP5K- MLI - RAL 8000 HK MP5, MP5K low profile picatinny scope mount. Manufactured in house at HK Germany as part of the "Mid-Life Improvement" upgrade for the...HKP-17661$399.99
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...HKP-16408$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...HKP-21374$26.95