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
-
On Sale
HK UMP Paddle Magazine Release - Extended
HKP HK Parts
Now: $27.95Was: $34.95HKP HK Parts Extended Paddle Magazine Release for HK UMP 9mm, .40 S&W, .45 ACP Billeted alloy UMP magazine release. This is a very common repair and replacement part as they are fairly easy to break on the UMP lower. With this new metal mag release...HKP-17919Now: $27.95Was: $34.95 -
On Sale
HK UMP, USC Flash Hider - Birdcage - Threaded 16x1 LH
HDPS
Now: $123.95Was: $137.95HDPS HK UMP/USC Birdcage Flash Hider For Threaded Barrels - Threaded 16x1 LH Designed for threaded barrels with a 16x1 LH thread, this flash suppressor is modeled after the HK UMP flash suppressor for flanged barrels. It’s perfect for those who...HKP-02579Now: $123.95Was: $137.95 -
HK UMP, USC Conversion Slide
H&K Heckler & Koch
$19.95HK USC & UMP Slide For Lower - German New HK German USC slide for conversion of UMP lower.HKP-00268$19.95 -
HK UMP, USC, G36, SL8 Notched Disk - Safe, Semi
H&K Heckler & Koch
$14.95HK Ratched Wheel, Notched Disk G36, SL8 0,1 (Safe & Fire) Only Compatible With: 0,1 or S,F only: HK UMP HK USC HK G36 HK SL8HKP-16361$14.95 -
On Sale
HK Night Vision Manual- Z51 Zeiss Fero
HKP HK Parts
Now: $15.95Was: $20.95HKP Night Vision Manual- Z51 Zeiss/Fero Fero, Zeiss Z-51 English translated operators manual. This is the manual for the recently imported German night vision scope for the MG3 Machinegun, G3 Rifle, and Pazerbusche 84. This is a page-by-page translation...HKP-15224Now: $15.95Was: $20.95 -
HK91, G3 A3 Retractable Buttstock - Used Good
H&K Heckler & Koch
$799.95HK Heckler and Koch A3 Retractable Stock for HK G3 and HK91 in Excellent Condition Used HK German A3 retractable buttstocks pulled from German G3 rifles. All come in working order with various degrees of use but 100% operational. These range from Good to...HKP-18067$799.95 -
HK33, HK53, HK93 Match Trigger Pack With Enhanced Trigger - 4.5lb
H&K Heckler & Koch
$474.95H&K 93/53/33 (5.56/.223) Match Trigger Pack With Enhanced Trigger - 4.5lb HK German SEMI HK 93 .223 & 5.56 trigger pack complete with custom trigger conversion to a light target trigger & ultra-smooth 4.5-5.0 LB. pull Each trigger pack has...HKP-17590$474.95 -
Out Of Stock
HK MP5 Locking Roller +2 - .40 S&W, 10mm
H&K Heckler & Koch
$19.99H&K Heckler and Koch +2 Roller for HK MP5 40,10 New HK German MP5 40,10 +2 roller. Hard to find and essential for making headspace adjustments when necessary. Great spare to have on hand and no longer in production. Please Note: The price...HKP-00334$19.99 -
On Sale
HK MP5F, MP5 Cocking Tube and Handle - Support Combo - .40 S&W / 10mm
HKP HK Parts
Now: $199.95Was: $249.95HKP MP5F & MP5 40,10 Cocking Tube, Handle, Support Combo HK MP5 40/10 or MP5 F factory correct USA made cocking tube and cocking tube support assembly complete. This is a factory correct MP5F/MP5 40/10 Cocking tube assembly complete. This assembly...HKP-18152Now: $199.95Was: $249.95 -
On Sale
AR-15 C.A.R.L. 3-Round Limiter Lever for FRTs
ST Inc
Now: $122.95Was: $145.00ST Inc. 3-Round C.A.R.L. Lever for AR-15 Rifles Equipped with AS Designs ARC-Fire and Atrius Trigger Systems The C.A.R.L. (Cam Activated Reset Limiter) is a drop-in FRT-piggy-back system that extends trigger release after every second round fired...HKP-22562Now: $122.95Was: $145.00 -
HK USP, HK45 Compact Magazine, Complete - 18 Round
HKP HK Parts / Heckler & Koch
$89.95Heckler and Koch, HKP 18 Round Magazine for HK45 Compact, HK USP45 Compact Complete 18-round magazine assembled using a factory Heckler and Koch magazine body combined with an HKP magazine extension. This configuration increases capacity while...HKP-22520$89.95 -
HK91, G3 Trunnion - New Old Stock
H&K Heckler & Koch
$79.95Heckler and Koch Trunnion for HK91, G3 - New Old Stock Original Heckler and Koch trunnion for HK91 and G3 rifles. This is a new old stock, original-production component from older HK manufacturing runs and has not been previously installed. Ideal for...HKP-99363$79.95