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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Out Of Stock
HK45C, USPC Firing Pin - Titanium
HKP HK Parts
$49.95HKP HK USPC/45C Titanium Firing Pin A solid billet CNC offering at 40+% lighter than comparable steel firing pins. Our titanium firing pins travel faster in the slide, delivering a quicker lock time & enhancing accuracy. Titanium pins also carry less...HKP-17801$49.95 -
HK USP, USP Tactical .45 ACP Lockout Device Set
H&K Heckler & Koch
$18.95Heckler and Koch HK USP45, USP45 Tactical Lockout Device Set Factory lockout device set designed for HK USP .45 ACP full-size pistols, including Tactical models. Intended for use in compatible lockout-equipped frames. Compatible With: USP45,...HKP-01503$18.95 -
HK USP Rear Sight
H&K Heckler & Koch
$59.95HK USP Rear Sight Fits all full size USP & USP tactical firearms. Compatible With: HK USP 9mm HK USP .40 Cal HK USP .45 Cal All USP tactical firearmsHKP-01622$59.95 -
Out Of Stock
HK USP V5, V6, V7 Complete Bobbed Hammer
H&K Heckler & Koch
$0.00HK USP V5/6/7 Complete Bobbed Hammer Compatible With: HK USP 9mm HK USP 40HKP-01934$0.00 -
Out Of Stock
HK USP Compact Firing Pin - Original Style
H&K Heckler & Koch
$59.95HK USP Compact Firing Pin - Original Style Compatible With: HK USP Compact 9mm HK USP Compact 40 S&W HK USP Compact 357 SIG HK USP Compact LEMHKP-01286$59.95 -
HK USP Fiber Optic Rear Sight - Green
Hi-Viz
$54.95Hi-Viz HK USP Fiber Optic Rear Sight - Green Fiber optic sights are becoming more and more popular as they never dim or become aged. Priced right and a great option for those that needs more from their sights. Compatible With: USP Compact 45, 40,...HKP-16940$54.95 -
Out Of Stock
HK USP Series Old Style Catch
H&K Heckler & Koch
$29.95H&K HK USP Series Old Style Catch Compatible With: HK USP 9mm HK USP 40 HK USP 45 HK USP Compact 9mm HK USP Compact 40 HK USP Compact 357 HK USP Compact 45 HK USP Compact LEMHKP-01176$29.95 -
HK416, MR556 Magazine Locking Plate
H&K Heckler & Koch
$9.95HK German HK MR556 & HK 416 Magazine Locking PlateHKP-13484$9.95 -
HK G36 Picatinny Rail - Lateral
H&K Heckler & Koch
$195.99H&K HK G36 Picatinny Rail HK Lateral Picatinny Rail - Ambidextrous for Sight Rails. Compatible With: G36 G36K G36C Specifications: Material: AluminumHKP-18725$195.99 -
HK G36 Lower Housing - 3 Position Navy 0,1,F Pictogram
H&K Heckler & Koch
$600.00H&K G36 (5.56/.223) 3 Position (0,1,F Pictogram) Navy Style Lower Housing This lower housing, featuring the 3 position (0,1,F) pictogram, is offered without internals. Previously, G36 lowers were only available as complete trigger groups, including...HKP-02230$600.00 -
Out Of Stock
HK UMP Barrel - .45 ACP - 8" - Threaded 16x1 LH with 3 Lug - US
HKP HK Parts
$399.95HKP H&K UMP .45 ACP Barrel - Threaded 16x1 LH - 3-Lug New USA made .45 ACP 8" barrel for the UMP or Omega firearms. Each barrel is threaded 16x1 RH and 3-Lug tipped. The finest barrel for the UMP .45 ACP on the market. Specifications: Overall Length...HKP-18511$399.95 -
Out Of Stock
HK USC Magazine Locking Plate Insert - .45 ACP
H&K Heckler & Koch
$8.95H&K USC (.45 ACP) Magazine Locking Plate InsertHKP-16384$8.95