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.
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
HK416, MR556 Buffer Spring - Enhanced
H&K Heckler & Koch
$19.95Heckler and Koch's Enhanced HK416 and HK416 Buffer Spring - HK German The HK MR556/416 buffer spring will also work with other AR-15 and M-16 rifles. It is a high-wear item and a must-have replacement part. Compatible With: HK416, MR556 HK416 A5 HK...HKP-00039$19.95 -
HK MP5, HK90 Series Magazine Catch Spring
H&K Heckler & Koch
$4.95Heckler and Koch Magazine Catch Spring for the HK90 Rifle Series New HK German manufacture, not used, worn out surplus springs. Perfect spare and a must-have mag catch spring for all 90 series rifles that use a detachable magazine. Compatible...HKP-01917$4.95 -
HK MP5 Magazine - 30 Round - .40 S&W, 10mm - US
HKP HK Parts
$49.95HKP HK Parts 30 Round Magazine, US Made for HK MP5 40/10 HKP, US made 30 round magazine for MP5's chambered in .40 S&W, 10mm, .357 Sig, and 9x25 Dillon. Each magazine counts as 3 US made components for satisfying 922r compliance. Compatible...HKP-16456$49.95 -
Out Of StockOn Sale
HK MP5 Stock with 4 QD Rubber Buttstock Pads
AC-Unity
Now: $68.71Was: $129.95AC-Unity HK MP5 Stock with 4 Rubber QD Butt Pads MP5 side folding stock assembly from AC-Unity. This assembly includes four quick detach butt pads for a custom fit, prefect for any shooter. Multiple sling attachments accomodate a wide range of...HKP-21634Now: $68.71Was: $129.95 -
HK Semi Auto Shelf for Receiver - Billeted
HKP HK Parts
$17.95HKP Semi Auto Shelf for Receiver - Billeted HK Semi Auto Shelf, Hanger Block to HK's factory specifications for c/p trigger housings. Weld on shelf that is the needed receiver block that welds to the rearward portion of the magwell to allow the use of...HKP-21470$17.95 -
HK UMP, USC Stock Axle Pin
Other
$14.95Heckler and Koch Stock Rear Stock Axle Pin for your HK UMP or USC This is the stock pin that allows you to attach the stock to either the factory receiver of a UMP or for those who are doing the USC to UMP conversion. This pin is required to attach the...HKP-02591$14.95 -
HK MP5, SP5, MP5K, SP5K Magazine - 10 Round - 9mm - California Compliant - KCI
KCI
$58.95California Complaint Magazine 10-30 - MP5, MP5K - GEN 2 - KCI USA This California compliant magazine has a 10 round block pre-installed which converts a factory 30 round magazine into a 10 round magazine. This is the best option to stay...HKP-20669$58.95 -
HK UMP, B&T APC Folding Buttstock
H&K Heckler & Koch
$138.95HK German UMP Folding Buttstock Brand new German HK folding stock. This is a required part for the USC-UMP Conversion using the (stock block B). All UMP folding buttstocks come with an HK date code. Compatible With: HK UMP HK USC-UMP...HKP-00252$138.95 -
HK MP5, HK94, MP5K, SP89 Firing Pin - Steel
HKP HK Parts
$17.47MP5, MP5K, 94, & SP89 Firing Pin - Steel Each part is made using the factory HK material and specifications from original HK German blueprints. Compatible With: MP5, HK94 MP5K, SP89, SP5K MP5 40, 10mm, .357 Sig Zenith, POF, Omega, DT,...HKP-02115$17.47 -
HK Armorer's Tool Kit
HKP HK Parts
$89.95HKP Armorer's Tool Kit Includes: HK Parts Armorers Puck Punch Bench Block Tool 8 Piece German Rennsteig punch set 20 Piece German Feeler gauge setHKP-18659$89.95 -
HKP 9mm Vented Micro Comp - Threaded 1/2x28 RH
HKP HK Parts
$29.95HKP 9mm Vented Micro Comp - Threaded 1/2x28 RH The HK Parts Micro Comp and Thread Protector is designed to be lightweight and functional as both a compensator and thread protector. The HK Parts Micro Comp easily attaches to the end of any factory spec...HKP-19721$29.95 -
HK MP5, HK94, HK93, HK91, PTR SL Grip Module Semi Shelf
Magpul
$59.95Magpul - SL Grip Module - HKMP5/94/93/91 & Semi Shelf & HK Clones The Magpul SL Grip Module is a high-strength, injection-molded polymer grip module for HK MP5/94/93/91 & Semi Shelf HK Clones*. Designed with improved ergonomics, a non-slip...HKP-19320$59.95