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 UMP, USC Hammer Spring - Left
H&K Heckler & Koch
$13.95Heckler and Koch Left Side Hammer Spring for All HK UMP and HK USC Lowers A high-wear item that needs to be changed when light firing pin strikes develop on your USC or UMP firearm. Compatible With: UMP9 UMP40 UMP45 USC .45 ACP and other...HKP-01898$13.95 -
HK23E Recoil Spring - 5.56/.223
H&K Heckler & Koch
$79.95New German HK Factory HK23E Recoil SpringHKP-02001$79.95 -
Out Of Stock
HK21 Carry Handle Axle Elbow Spring
HKP HK Parts
$11.95HK21 & 21E Carry Handle Axle Elbow Spring This part is needed and is used in conjunction with the actual carry handle, axle, axle spring, and (2) E-clips. This is the elbow spring portion of the needed part for the assembly.HKP-00578$11.95 -
Out Of Stock
HK21E, HK23E Cocking Handle - Extended
H&K Heckler & Koch
$0.00HK21E, HK23E & HK11E, 13E Factory German Extended Cocking Handle This cocking handle is for the HK 21E, HK 23E guns only and will not work in HK91, G3 & PTR rifles.HKP-00580$0.00 -
On Sale
HK91, G3 Trigger Pack - Ambi 0,1 - Semi-Auto - Match Trigger
HKP HK Parts
Now: $379.95Was: $474.95HK Parts and Heckler and Koch 2 Position 0,1 Ambidextrous Match Trigger Pack HK G3 and HK91 (7.62x51/.308) Complete with custom trigger conversion to achieve a light target trigger with an ultra-smooth pull. This HK German semi-auto...hkp-18425Now: $379.95Was: $474.95 -
On Sale
HK MP5SD Locking Piece - 110 Degree - .40 S&W, 10mm
HKP HK Parts
Now: $39.95Was: $49.95MP5 40 & MP5 10mm SD 110 Degree Locking Piece - USA Made in the USA from an enhanced material and heat treated to factory specifications. Each US made MP5 40/10 SD 110 degree locking price is designed for use with the MP5 40/10 SD variants...HKP-18274Now: $39.95Was: $49.95 -
HK MP5, MP5K Locking Piece - 100 Degree - Extra Low Impulse - .40 S&W, 10mm
HKP HK Parts
$49.95HKP MP5/K 40/10 Locking Piece - Extra Low Impulse Marked 100 Degree For the MP5 40 or 10mm Firearms. Made out of enhanced material and heat-treated to spec. The #100 degree locking piece is an extra low impulse 40/10 locking piece. To be used with MP5...HKP-18273$49.95 -
On Sale
HK MP5N Barrel - 9mm - 8.85" - Threaded 1/2x32 with 3 Lug
RCM
Now: $152.95Was: $179.95RCM HK MP5N 9mm Barrel - Threaded 1/2x32 - 3-Lug This MP5N barrel delivers exceptional value, crafted from premium Cold Hammer Forged Steel and treated with a durable nitride process. It easily accommodates suppressors and other muzzle attachments. Brand...HKP-16967Now: $152.95Was: $179.95 -
On Sale
HK MP5, HK94, SP89, SP5K Optic Mount - Low Profile - Picatinny
CFG
Now: $101.95Was: $119.95CFG Low Profile Rear Sight Base Mount - 10 Slot This new offering is a neat low profile offering that allows the user to replace the rear sight and add an extremely low profile super robust picatinny optic mount to your HK MP5, MP5K firearm. Made in the...HKP-18236Now: $101.95Was: $119.95 -
Out Of Stock
HK MP5, MP5K 9mm, Ambidextrous Navy Trigger Pack
H&K Heckler & Koch
$0.00H&K MP5/K 9mm Ambidextrous Navy Style Trigger Pack Designed for HK MP5 and MP5K 9mm ambidextrous housings and selector levers, this trigger pack features a Navy-style configuration with three positions: Safe, Semi, and Full. It offers the classic...HKP-16971$0.00 -
On Sale
HK MP5, HK94 Optic Mount - 246mm - Low Profile - Picatinny
B&T Brugger & Thomet
Now: $215.95Was: $239.95B&T MP5, 94 Low Mount, Extra Long Scope Rail Swiss made, military grade, B&T MP5 extra long low-profile scope mount. Requires the removal of the MP5 rear sight. Provides the longest possible Picatinny rail. Specifications: Color: Black Height...HKP-16881Now: $215.95Was: $239.95 -
On Sale
HK MP5K Trigger Group - Super Safety - Push Pin
War Hammer Armaments
$499.95 - $539.95War Hammer Armaments Polymer MP5K Super Safety Lower Receiver - Push Pin War Hammer Super Safety complete lower for MP5K push pin platforms. Constructed of Kevlar and carbon-fiber–infused polymer, this complete lower is engineered for...HKP-22827-M$499.95 - $539.95